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Fundamentals of Financial Management

Eugene F. Brigham, Joel F. Houston

Chapter 7

Time Value of Money - all with Video Answers

Educators


Chapter Questions

01:20

Problem 1

If you deposit $\$ 10,000$ in a bank account that pays 10 percent interest annually, how much money will be in your account after 5 years?

Jennifer Stoner
Jennifer Stoner
Numerade Educator
01:08

Problem 2

What is the present value of a security that promises to pay you $\$ 5,000$ in 20 years? Assume that you can earn 7 percent if you were to invest in other securities of equal risk.

Monica Miller
Monica Miller
Numerade Educator
02:07

Problem 3

If you deposit money today into an account that pays 6.5 percent interest, how long will it take for you to double your money?

Sanchit Jain
Sanchit Jain
Numerade Educator
02:07

Problem 4

John Roberts has $\$ 42,180.53$ in a brokerage account, and he plans to contribute an additional $\$ 5,000$ to the account at the end of every year. The brokerage account has an expected annual return of 12 percent. If John's goal is to accumulate $\$ 250,000$ in the account, how many years will it take for John to reach his goal?

Kratika Bhadauria
Kratika Bhadauria
Numerade Educator
01:23

Problem 5

Your parents are planning to retire in 18 years. They currently have $\$ 250,000$, and they would like to have $\$ 1,000,000$ when they retire. What annual rate of interest would they have to earn on their $\$ 250,000$ in order to reach their goal, assuming they save no more money?

Narayan Hari
Narayan Hari
Numerade Educator
03:39

Problem 6

What is the future value of a 5 -year ordinary annuity that promises to pay you $\$ 300$ each year? The rate of interest is 7 percent.

Charles Carter
Charles Carter
Numerade Educator
02:28

Problem 7

What is the future value of a 5 -year annuity due that promises to pay you $\$ 300$ each year? Assume that all payments are reinvested at 7 percent a year, until Year 5

Dharmendra Jain
Dharmendra Jain
Numerade Educator
02:34

Problem 8

What is the future value of a 5 -year annuity due that promises to pay you $\$ 300$ each year? Assume that all payments are reinvested at 7 percent a year, until Year 4.

Dharmendra Jain
Dharmendra Jain
Numerade Educator
02:40

Problem 9

An investment pays you $\$ 100$ at the end of each of the next 3 years. The investment will then pay you $\$ 200$ at the end of Year $4, \$ 300$ at the end of Year $5,$ and $\$ 500$ at the end of Year $6 .$ If the interest rate earned on the investment is 8 percent, what is its present value? What is its future value?

Narayan Hari
Narayan Hari
Numerade Educator
04:19

Problem 10

An investment pays you 9 percent interest, compounded quarterly. What is the periodic rate of interest? What is the nominal rate of interest? What is the effective rate of interest?

Harmender Singh Yadav
Harmender Singh Yadav
Numerade Educator
03:19

Problem 11

You are thinking about buying a car, and a local bank is willing to lend you $\$ 20,000$ to buy the car. Under the terms of the loan, it will be fully amortized over 5 years (60 months $),$ and the nominal rate of interest will be 12 percent, with interest paid monthly. What would be the monthly payment on the loan? What would be the effective rate of interest on the loan?

Oluwadamilola Ameobi
Oluwadamilola Ameobi
Numerade Educator
01:46

Problem 12

Which amount is worth more at 14 percent, compounded annually: $\$ 1,000$ in hand today or $\$ 2,000$ due in 6 years?

Amy Jiang
Amy Jiang
Numerade Educator
03:46

Problem 13

Shalit Corporation's 2001 sales were \$12 million. Sales were \$6 million 5 years earlier
$(\text { in } 1996)$
a. To the nearest percentage point, at what rate have sales been growing?
b. Suppose someone calculated the sales growth for Shalit Corporation in part a as follows: "Sales doubled in 5 years. This represents a growth of 100 percent in 5 years so, dividing 100 percent by $5,$ we find the growth rate to be 20 percent per year." Explain what is wrong with this calculation.

Linh Vu
Linh Vu
Numerade Educator
02:48

Problem 14

Washington-Atlantic invests $\$ 4$ million to clear a tract of land and to set out some young pine trees. The trees will mature in 10 years, at which time Washington-Atlantic plans to sell the forest at an expected price of $\$ 8$ million. What is Washington-Atlantic's expected rate of return?

David Mccaslin
David Mccaslin
Numerade Educator
00:34

Problem 15

Your broker offers to sell you a note for $\$ 13,250$ that will pay $\$ 2,345.05$ per year for 10 years. If you buy the note, what interest rate (to the closest percent) will you be earning?

Kimberly Waterbury
Kimberly Waterbury
Numerade Educator
04:17

Problem 16

A mortgage company offers to lend you $\$ 85,000 ;$ the loan calls for payments of $\$ 8,273.59$ per year for 30 years. What interest rate is the mortgage company charging you?

Willis James
Willis James
Numerade Educator
05:43

Problem 17

To complete your last year in business school and then go through law school, you will need $\$ 10,000$ per year for 4 years, starting next year (that is, you will need to withdraw the first $\$ 10,000$ one year from today $.$ Your rich uncle offers to put you through school, and he will deposit in a bank paying 7 percent interest, compounded annually, a sum of money that is sufficient to provide the 4 payments of $\$ 10,000$ each. His deposit will be made today.
a. How large must the deposit be?
b. How much will be in the account immediately after you make the first withdrawal? After the last withdrawal?

Oluwadamilola Ameobi
Oluwadamilola Ameobi
Numerade Educator
04:29

Problem 18

While you were a student in college, you borrowed $\$ 12,000$ in student loans at an interest rate of 9 percent, compounded annually. If you repay $\$ 1,500$ per year, how long, to the nearest year, will it take you to repay the loan?

AG
Ankit Gupta
Numerade Educator
01:08

Problem 19

You need to accumulate $\$ 10,000$. Io do so, you plan to make deposits of $\$ 1,250$ per year, with the first payment being made a year from today, in a bank account that pays 12 percent interest, compounded annually. Your last deposit will be less than $\$ 1,250$ if less is needed to round out to $\$ 10,000 .$ How many years will it take you to reach your $\$ 10,000$ goal, and how large will the last deposit be?

Kratika Bhadauria
Kratika Bhadauria
Numerade Educator
02:32

Problem 20

A rookie quarterback is in the process of negotiating his first contract. The team's general manager has offered him three possible contracts. Each of the contracts lasts for 4 years. All of the money is guaranteed and is paid at the end of each year. The terms of each of the contracts are listed below:
The quarterback discounts all cash flows at 10 percent. Which of the three contracts offers him the most value?

Lauren Shelton
Lauren Shelton
Numerade Educator
01:45

Problem 21

What is the present value of a perpetuity of $\$ 100$ per year if the appropriate discount rate is 7 percent? If interest rates in general were to double and the appropriate discount rate rose to 14 percent, what would happen to the present value of the perpetuity?

Kaylee Mcclellan
Kaylee Mcclellan
Numerade Educator
02:40

Problem 22

Assume that you inherited some money. A friend of yours is working as an unpaid intern at a local brokerage firm, and her boss is selling some securities that call for 4 payments, $\$ 50$ at the end of each of the next 3 years, plus a payment of $\$ 1,050$ at the end of Year
4. Your friend says she can get you some of these securities at a cost of $\$ 900$ each. Your money is now invested in a bank that pays an 8 percent nominal (quoted) interest rate, but with quarterly compounding. You regard the securities as being just as safe, and as liquid, as your bank deposit, so your required effective annual rate of return on the securities is the same as that on your bank deposit. You must calculate the value of the securities to decide whether they are a good investment. What is their present value to you?

Sheryl Ezze
Sheryl Ezze
Numerade Educator
01:46

Problem 23

Assume that your aunt sold her house on December $31,$ and that she took a mortgage in the amount of $\$ 10,000$ as part of the payment. The mortgage has a quoted (or nominal) interest rate of 10 percent, but it calls for payments every 6 months, beginning on June $30,$ and the mortgage is to be amortized over 10 years. Now, one year later, your aunt must file Schedule $\mathrm{B}$ of her tax return with the IRS, informing them of the interest that was included in the 2 payments made during the year. (This interest will be income to your aunt and a deduction to the buyer of the house.) To the closest dollar, what is the total amount of interest that was paid during the first year?

Kaylee Mcclellan
Kaylee Mcclellan
Numerade Educator
01:55

Problem 24

Your company is planning to borrow $\$ 1,000,000$ on a 5 -year, $15 \%,$ annual payment, fully amortized term loan. What fraction of the payment made at the end of the second year will represent repayment of principal?

Zach Steedman
Zach Steedman
Numerade Educator
02:35

Problem 25

a. It is now January $1,2002 .$ You plan to make 5 deposits of $\$ 100$ each, one every 6 months, with the first payment being made today. If the bank pays a nominal interest rate of 12 percent, but uses semiannual compounding, how much will be in your account after 10 years?
b. Ten years from today you must make a payment of $\$ 1,432.02 .$ To prepare for this payment, you will make 5 equal deposits, beginning today and for the next 4 quarters, in a bank that pays a nominal interest rate of 12 percent, quarterly compounding. How large must each of the 5 payments be?

Nick Johnson
Nick Johnson
Numerade Educator
01:43

Problem 26

As the manager of Oaks Mall Jewelry, you want to sell on credit, giving customers 3 months in which to pay. However, you will have to borrow from the bank to carry the accounts receivable. The bank will charge a nominal 15 percent, but with monthly compounding. You want to quote a nominal rate to your customers (all of whom are expected to pay on time) that will exactly cover your financing costs. What nominal annual rate should you quote to your credit customers?

Brian Lovejoy
Brian Lovejoy
Numerade Educator
01:47

Problem 27

Assume that your father is now 50 years old, that he plans to retire in 10 years, and that he expects to live for 25 years after he retires, that is, until he is $85 .$ He wants a fixed retirement income that has the same purchasing power at the time he retires as $\$ 40,000$ has today (he realizes that the real value of his retirement income will decline year by year after he retires). His retirement income will begin the day he retires, 10 years from today, and he will then get 24 additional annual payments. Inflation is expected to be 5 percent per year from today forward; he currently has $\$ 100,000$ saved up; and he expects to earn a return on his savings of 8 percent per year, annual compounding. To the nearest dollar, how much must he save during each of the next 10 years (with deposits being made at the end of each year) to meet his retirement goal?

Kratika Bhadauria
Kratika Bhadauria
Numerade Educator
08:15

Problem 28

The prize in last week's Florida lottery was estimated to be worth $\$ 35$ million. If you were lucky enough to win, the state will pay you $\$ 1.75$ million per year over the next 20 years. Assume that the first installment is received immediately.
a. If interest rates are 8 percent, what is the present value of the prize?
b. If interest rates are 8 percent, what is the future value after 20 years?
c. How would your answers change if the payments were received at the end of each year?

AG
Ankit Gupta
Numerade Educator
06:19

Problem 29

Your client is 40 years old and wants to begin saving for retirement. You advise the client to put $\$ 5,000$ a year into the stock market. You estimate that the market's return will be, on average, 12 percent a year. Assume the investment will be made at the end of the year.
a. If the client follows your advice, how much money will she have by age $65 ?$
b. How much will she have by age 70 ?

Charles Carter
Charles Carter
Numerade Educator
02:15

Problem 30

You are serving on a jury. A plaintiff is suing the city for injuries sustained after falling down an uncovered manhole. In the trial, doctors testified that it will be 5 years before the plaintiff is able to return to work. The jury has already decided in favor of the plaintiff, and has decided to grant the plaintiff an award to cover the following items:
(1) Recovery of 2 years of back-pay $(\$ 34,000 \text { in } 2000, \text { and } \$ 36,000 \text { in } 2001) .$ Assume that it is December 31,2001 , and that all salary is received at year end. This recovery should include the time value of money.
(2) The present value of 5 years of future salary $(2002-2006)$. Assume that the plaintiffs salary would increase at a rate of 3 percent a year.
(3) $\$ 100,000$ for pain and suffering.
(4) $\$ 20,000$ for court costs. Assume an interest rate of 7 percent. What should be the size of the settlement?

Amatullah Ahmed
Amatullah Ahmed
Numerade Educator
04:18

Problem 31

You just started your first job, and you want to buy a house within 3 years. You are currently saving for the down payment. You plan to save $\$ 5,000$ the first year. You also anticipate that the amount you save each year will rise by 10 percent a year as your salary increases over time. Interest rates are assumed to be 7 percent, and all savings occur at year end. How much money will you have for a down payment in 3 years?

Zach Steedman
Zach Steedman
Numerade Educator
02:13

Problem 32

A 15 -year security has a price of $\$ 340.4689 .$ The security pays $\$ 50$ at the end of each of the next 5 years, and then it pays a different fixed cash flow amount at the end of each of the following 10 years. Interest rates are 9 percent. What is the annual cash flow amount between Years 6 and 15 ?

Kaylee Mcclellan
Kaylee Mcclellan
Numerade Educator
04:24

Problem 33

An investment pays $\$ 20$ semiannully for the next 2 years. The investment has a 7 percent nominal interest rate, and interest is compounded quarterly. What is the future value of the investment?

Jonathan Tapiwa
Jonathan Tapiwa
Numerade Educator
17:09

Problem 34

Find the following values, using the equations, and then work the problems using a financial calculator or the tables to check your answers. Disregard rounding differences. (Hint: If you are using a financial calculator, you can enter the known values, and then press the appropriate key to find the unknown variable. Then, without clearing the TVM register, you can "override" the variable that changes by simply entering a new value for it and then pressing the key for the unknown variable to obtain the second answer. This procedure can be used in parts b and $\mathrm{d}$, and in many other situations, to see how changes in input variables affect the output variable.) Assume that compounding/discounting occurs once a year.
a. An initial $\$ 500$ compounded for 1 year at 6 percent.
b. An initial $\$ 500$ compounded for 2 years at 6 percent.
c. The present value of $\$ 500$ due in 1 year at a discount rate of 6 percent.
d. The present value of $\$ 500$ due in 2 years at a discount rate of 6 percent.

Sreeraj P
Sreeraj P
Numerade Educator
10:38

Problem 35

Use the tables or a financial calculator to find the following values. See the hint for Problem $7-34$. Assume that compounding/discounting occurs once a year
a. An initial $\$ 500$ compounded for 10 years at 6 percent.
b. An initial $\$ 500$ compounded for 10 years at 12 percent.
c. The present value of $\$ 500$ due in 10 years at a 6 percent discount rate.
d. The present value of $\$ 1,552.90$ due in 10 years at a 12 percent discount rate and at a 6 percent rate. Give a verbal definition of the term present value, and illustrate it using a time line with data from this problem. As a part of your answer, explain why present values are dependent upon interest rates.

Md.Daniyal Arshad
Md.Daniyal Arshad
Numerade Educator
04:21

Problem 36

To the closest year, how long will it take $\$ 200$ to double if it is deposited and earns the following rates? [Notes: (1) See the hint for Problem 7-34. (2) This problem cannot be solved exactly with some financial calculators. For example, if you enter $\mathrm{PV}=-200, \mathrm{FV}=$ $400,$ and $I=7$ in an $\mathrm{HP}-12 \mathrm{C}$, and then press the $\mathrm{N}$ key, you will get 11 years for part
a. The correct answer is 10.2448 years, which rounds to $10,$ but the calculator rounds up. However, the HP-10B and HP-17B give the correct answer. You should look up $\mathrm{FVIF}=\$ 400 / \$ 200=2$ in the tables for parts $a, b,$ and $c,$ but figure out part d.] Assume that compounding occurs once a year.
a. 7 percent.
b. 10 percent.
c. 18 percent.
d. 100 percent.

Julian Wong
Julian Wong
Numerade Educator
01:57

Problem 37

Find the future value of the following annuities. The first payment in these annuities is made at the end of Year $1 ;$ that is, they are ordinary annuities. (Note: See the hint to Problem $7-34 .$ Also, note that you can leave values in the TVM register, switch to "BEG,"press $\mathrm{FV},$ and find the $\mathrm{FV}$ of the annuity due.) Assume that compounding occurs once a year.
a. $\$ 400$ per year for 10 years at 10 percent.
b. $\$ 200$ per year for 5 years at 5 percent.
c. $\$ 400$ per year for 5 years at 0 percent.
d. Now rework parts a, b, and c assuming that payments are made at the beginning of each year; that is, they are annuities due.

Julie Silva
Julie Silva
Numerade Educator
03:39

Problem 38

Find the present value of the following ordinary annuities (see note to Problem $7-37$ ). Assume that discounting occurs once a year.
a. $\$ 400$ per year for 10 years at 10 percent.
b. $\$ 200$ per year for 5 years at 5 percent.
c. $\$ 400$ per year for 5 years at 0 percent.
d. Now rework parts a, b, and c assuming that payments are made at the beginning of each year; that is, they are annuities due.

Charles Carter
Charles Carter
Numerade Educator
02:21

Problem 39

a. Find the present values of the following cash flow streams. The appropriate interest rate is 8 percent, compounded annually. (Hint: It is fairly easy to work this problem dealing with the individual cash flows. However, if you have a financial calculator, read the section of the manual that describes how to enter cash flows such as the ones in this problem. This will take a little time, but the investment will pay huge dividends throughout the course. Note that if you do work with the cash flow register, you must enter $\left.\mathrm{CF}_{0}=0 .\right)$
b. What is the value of each cash flow stream at a 0 percent interest rate, compounded annually?

Julian Wong
Julian Wong
Numerade Educator
View

Problem 40

Find the interest rates, or rates of return, on each of the following:
a. You borrow $\$ 700$ and promise to pay back $\$ 749$ at the end of 1 year.
b. You lend $\$ 700$ and receive a promise to be paid $\$ 749$ at the end of 1 year.
c. You borrow $\$ 85,000$ and promise to pay back $\$ 201,229$ at the end of 10 years.
d. You borrow $\$ 9,000$ and promise to make payments of $\$ 2,684.80$ per year for 5 years.

Taylor Jordan
Taylor Jordan
Numerade Educator
02:04

Problem 41

Find the amount to which $\$ 500$ will grow under each of the following conditions:
a. 12 percent compounded annually for 5 years.
b. 12 percent compounded semiannually for 5 years.
c. 12 percent compounded quarterly for 5 years.
d. 12 percent compounded monthly for 5 years.

AG
Ankit Gupta
Numerade Educator
02:04

Problem 42

Find the present value of $\$ 500$ due in the future under each of the following conditions:
a. 12 percent nominal rate, semiannual compounding, discounted back 5 years.
b. 12 percent nominal rate, quarterly compounding, discounted back 5 years.
c. 12 percent nominal rate, monthly compounding, discounted back 1 year.

AG
Ankit Gupta
Numerade Educator
04:04

Problem 43

Find the future values of the following ordinary annuities:
a. $\mathrm{FV}$ of $\$ 400$ each 6 months for 5 years at a nominal rate of 12 percent, compounded semiannually.
b. $\mathrm{FV}$ of $\$ 200$ each 3 months for 5 years at a nominal rate of 12 percent, compounded quarterly.
c. The annuities described in parts a and b have the same amount of money paid into them during the 5 -year period, and both earn interest at the same nominal rate, yet the annuity in part b earns $\$ 101.75$ more than the one in part a over the 5 years. Why does this occur?

Niamat Khuda
Niamat Khuda
Numerade Educator
02:26

Problem 44

The First City Bank pays 7 percent interest, compounded annually, on time deposits. The Second City Bank pays 6 percent interest, compounded quarterly.
a. Based on effective, or equivalent, interest rates, in which bank would you prefer to deposit your money?
b. Could your choice of banks be influenced by the fact that you might want to withdraw your funds during the year as opposed to at the end of the year? In answering this question, assume that funds must be left on deposit during the entire compounding period in order for you to receive any interest.

Priyanka Sadarangani
Priyanka Sadarangani
Numerade Educator
04:15

Problem 45

a. Set up an amortization schedule for a $\$ 25,000$ loan to be repaid in equal installments at the end of each of the next 5 years. The interest rate is 10 percent, compounded annually.
b. How large must each annual payment be if the loan is for $\$ 50,000$ ? Assume that the interest rate remains at 10 percent, compounded annually, and that the loan is paid off over 5 years.
c. How large must each payment be if the loan is for $\$ 50,000$, the interest rate is 10 percent, compounded annually, and the loan is paid off in equal installments at the end of each of the next 10 years? This loan is for the same amount as the loan in part b, but the payments are spread out over twice as many periods. Why are these payments not half as large as the payments on the loan in part b?

Ivan Kochetkov
Ivan Kochetkov
Numerade Educator
04:56

Problem 46

The Jackson family is interested in buying a home. The family is applying for a $\$ 125,000,30$ -year mortgage. Under the terms of the mortgage, they will receive $\$ 125,000$ today to help purchase their home. The loan will be fully amortized over the next 30 years. Current mortgage rates are 8 percent. Interest is compounded monthly and all payments are due at the end of the month.
a. What is the monthly mortgage payment?
b. What portion of the mortgage payments made during the first year will go toward interest?
c. What will be the remaining balance on the mortgage after 5 years?
d. How much could the Jacksons borrow today if they were willing to have a $\$ 1,200$ monthly mortgage payment? (Assume that the interest rate and the length of the loan remain the same.)

Julie Silva
Julie Silva
Numerade Educator
10:38

Problem 47

Assume that AT\&T's pension fund managers are considering two alternative securities as investments: (1) Security Z (for zero intermediate year cash flows), which costs $\$ 422.41$ today, pays nothing during its 10 -year life, and then pays $\$ 1,000$ after 10 years or (2) Security $\mathrm{B}$, which has a cost today of $\$ 1,000$ and which pays $\$ 80$ at the end of each of the next 9 years and then $\$ 1,080$ at the end of Year 10
a. What is the rate of return on each security?
b. Assume that the interest rate AT\&T's pension fund managers can earn on the fund's money falls to 6 percent, compounded annually, immediately after the securities are purchased and is expected to remain at that level for the next 10 years. What would the price of each security change to, what would the fund's profit be on each security, and what would be the percentage profit (profit divided by cost) for each security?
c. Assuming that the cash flows for each security had to be reinvested at the new 6 percent market interest rate, (1) what would be the value attributable to each security at the end of 10 years and (2) what "actual, after-the-fact" rate of return would the fund have earned on each security? (Hint: The "actual" rate of return is found as the interest rate that causes the $\mathrm{PV}$ of the compounded Year 10 amount to equal the original cost of the security.)
d. Now assume all the facts as given in parts b and $c,$ except assume that the interest rate rose to 12 percent rather than fell to 6 percent. What would happen to the profit figures as developed in part b and to the "actual" rates of return as determined in part
c? Explain your results.

Md.Daniyal Arshad
Md.Daniyal Arshad
Numerade Educator
09:22

Problem 48

A father is planning a savings program to put his daughter through college. His daughter is now 13 years old. She plans to enroll at the university in 5 years, and it should take her 4 years to complete her education. Currently, the cost per year (for everything $-$ food, clothing, tuition, books, transportation, and so forth) is $\$ 12,500,$ but a 5 percent annual inflation rate in these costs is forecasted. The daughter recently received $\$ 7,500$ from her grandfather's estate; this money, which is invested in a bank account paying 8 percent interest, compounded annually, will be used to help meet the costs of the daughter's education. The remaining costs will be met by money the father will deposit in the savings account. He will make 6 equal deposits to the account, one deposit in each year from now until his daughter starts college. These deposits will begin today and will also earn 8 percent interest, compounded annually.
a. What will be the present value of the cost of 4 years of education at the time the daughter becomes 18 ? [Hint: Calculate the future value of the cost (at $5 \%$ ) for each year of her education, then discount 3 of these costs back (at $8 \%$ ) to the year in which she turns $18,$ then sum the 4 costs.
b. What will be the value of the $\$ 7,500$ that the daughter received from her grandfather's estate when she starts college at age 18 ? (Hint: Compound for 5 years at an 8 percent annual rate.
c. If the father is planning to make the first of 6 deposits today, how large must each deposit be for him to be able to put his daughter through college? (Hint: An annuity due assumes interest is earned on all deposits; however, the 6 th deposit earns no interest - therefore, the deposits are an ordinary annuity.)

Heather Zimmers
Heather Zimmers
Numerade Educator
06:13

Problem 49

Answer the following questions, using a spreadsheet model to do the calculations.
a. Find the $\mathrm{FV}$ of $\$ 1,000$ invested to earn 10 percent after 5 years. Answer this question by using a math formula and also by using the Excel function wizard.
b. Now create a table that shows the FV at 0 percent, 5 percent, and 20 percent for 0, $1,2,3,4,$ and 5 years. Then create a graph with years on the horizontal axis and FV on the vertical axis to display your results
c. Find the $\mathrm{PV}$ of $\$ 1,000$ due in 5 years if the discount rate is 10 percent. Again, work the problem with a formula and also by using the function wizard.
d. A security has a cost of $\$ 1,000$ and will return $\$ 2,000$ after 5 years. What rate of return does the security provide?
e. Suppose California's population is 30 million people, and its population is expected to grow by 2 percent per year. How long would it take for the population to double?
f. Find the $\mathrm{PV}$ of an annuity that pays $\$ 1,000$ at the end of each of the next 5 years if the interest rate is 15 percent. Then find the FV of that same annuity.
g. How would the $\mathrm{PV}$ and $\mathrm{FV}$ of the annuity change if it were an annuity due rather than an ordinary annuity?
h. What would the FV and the PV for parts a and c be if the interest rate were 10 percent with semiannual compounding rather than 10 percent with annual compounding?
i. Find the $\mathrm{PV}$ and the $\mathrm{FV}$ of an investment that makes the following end-of-year payments. The interest rate is 8 percent.
j. Suppose you bought a house and took out a mortgage for $\$ 50,000$. The interest rate is 8 percent, and you must amortize the loan over 10 years with equal end-of-year payments. Set up an amortization schedule that shows the annual payments and the amount of each payment that goes to pay off the principal and the amount that constitutes interest expense to the borrower and interest income to the lender.
(1) Create a graph that shows how the payments are divided between interest and principal repayment over time.
(2) Suppose the loan called for 10 years of monthly payments, with the same original amount and the same nominal interest rate. What would the amortization schedule show now?
k. Refer to Problem $7-48$. Solve this problem using a spreadsheet model.

AG
Ankit Gupta
Numerade Educator
06:13

Problem 50

In managing one's own finances, as well as those of a business, there are numerous decision situations where applications of Time Value of Money (TVM) concepts and methods help one assess the financial consequences of alternative courses of action. One such situation is the decision to prepay part or all of one's mortgage or loan balance by making extra periodic principal payments. As one makes extra principal payments, the loan balance is reduced faster. This means you pay less interest over the life of the loan and the loan will be repaid earlier (that is, fewer payments). For example, a person might decide to pay $\$ 50$ per month extra (that is, if their mort- gage payment was $\$ 900$ per month, they might pay $\$ 950$ each month, $\$ 50$ extra) on a mortgage loan. The extra payment of $\$ 50$ would be applied each month to reduce the principal balance. However, there are important factors to consider before making this decision. For example, if the mortgage loan is on the person's primary residence, the interest on the loan may be tax deductible. As you know from previous text chapters, this reduces the net, after-tax cost of the loan.
To consider the financial consequences of this decision, visit the web site 1
www.interest.com/hugh/calc, which offers various web calculators free, including a prepayment versus investment scenario analysis. Before using this web site, you will need to amortize the loan you will use as input data for the analysis.
Suppose you purchase a home for $\$ 150,000$ and obtain a 90 percent mortgage loan, 30 -year maturity, at a fixed annual interest rate of 8 percent, with deferred monthly payments. What is the monthly payment for principal and interest (P\&I) on this loan?
The loan amount is $\$ 150,000 \times 0.90=\$ 135,000 .$ The calculator keystrokes follow. $\mathrm{N}=360(30 \text { years } \times 12 \text { months per year }) ; \mathrm{I}=8.0 / 12=0.6667 ; \mathrm{PV}=-135000 ; \mathrm{FV}$
$=0$ (the loan will be paid off at maturity); solve for $\mathrm{PMT}=\$ 990.62 .$ (Note: If you enter the interest rate at 0.6667 percent per month you get the payment above. If you carry full precision on your calculator, the $\mathrm{PMT}=\$ 990.58 .$ The data you will need for the prepayment scenario include the following.
* The investment rate return is your opportunity cost estimate. It is the annual rate you think you can earn on the $\$ 50$ extra principal payment if you did not make extra principal payments on your mortgage but instead, invested it.
Now visit the web site www.interest.com/hugh/calc, and select Prepayment ver-
sus Investment.
a. After 12 months of making extra payments, what will be the loan balance?
b. After 12 months of making the regular payment and investing the $\$ 50,$ what will be the loan balance?
c. Under the regular payment and investing option, excluding the tax due on the interest earned, what is the investment balance after 12 months?
d. Compare the scenarios of investment versus prepayment by examining the 60 th payment, which occurs at the end of the 5 th year. What is the difference between the (1) interest portion of that payment, (2) tax deduction for interest, and (3) principal balance? Finally, how much is in the investment account?

AG
Ankit Gupta
Numerade Educator
03:24

Problem 51

Assume that you are nearing graduation and that you have applied for a job with a local bank, First National Bank. As part of the bank's evaluation process, you have been asked to take an examination that covers several financial analysis techniques. The first section of the test addresses time value of money analysis. See how you would do by answering the following questions.
a. Draw time lines for (1) a $\$ 100$ lump sum cash flow at the end of Year 2,(2) an ordinary annuity of $\$ 100$ per year for 3 years, and (3) an uneven cash flow stream of $-\$ 50$ $\$ 100, \$ 75,$ and $\$ 50$ at the end of Years 0 through 3
b. (1) What is the future value of an initial $\$ 100$ after 3 years if it is invested in an account paying 10 percent, annual compounding?(2) What is the present value of $\$ 100$ to be received in 3 years if the appropriate interest rate is 10 percent, annual compounding?
c. We sometimes need to find how long it will take a sum of money (or anything else) to grow to some specified amount. For example, if a company's sales are growing at a rate of 20 percent per year, how long will it take sales to double?
d. What is the difference between an ordinary annuity and an annuity due? What type of annuity is shown below? How would you change it to the other type of annuity?
e. (1) What is the future value of a 3-year ordinary annuity of $\$ 100$ if the appropriate interest rate is 10 percent, annual compounding?
(2) What is the present value of the annuity?
(3) What would the future and present values be if the annuity were an annuity due?
f. What is the present value of the following uneven cash flow stream? The appropriate interest rate is 10 percent, compounded annually.
g. What annual interest rate will cause $\$ 100$ to grow to $\$ 125.97$ in 3 years?
h. A 20 -year-old student wants to begin saving for her retirement. Her plan is to save $\$ 3$ a day. Every day she places $\$ 3$ in a drawer. At the end of each year, she invests the accumulated savings $(\$ 1,095)$ in an online stock account that has an expected annual return of 12 percent.
(1) If she keeps saving in this manner, how much will she have accumulated by age $65 ?$
(2) If a 40 -year-old investor began saving in this manner, how much would he have by age 65 ?
(3) How much would the 40 -year-old investor have to save each year to accumulate the same amount at age 65 as the 20 -year-old investor described above?
i. (1) Will the future value be larger or smaller if we compound an initial amount more often than annually, for example, every 6 months, or semiannually, holding the stated interest rate constant? Why?
(2) Define (a) the stated, or quoted, or nominal, rate, (b) the periodic rate, and (c) the effective annual rate $(\mathrm{EAR})$
(3) What is the effective annual rate corresponding to a nominal rate of 10 percent, compounded semiannually? Compounded quarterly? Compounded daily?
(4) What is the future value of $\$ 100$ after 3 years under 10 percent semiannual compounding? Quarterly compounding?
j. When will the effective annual rate be equal to the nominal (quoted) rate?
k. (1) What is the value at the end of Year 3 of the following cash flow stream if the quoted interest rate is 10 percent, compounded semiannually?
(2) What is the PV of the same stream?
(3) Is the stream an annuity?
(4) An important rule is that you should never show a nominal rate on a time line or use it in calculations unless what condition holds? (I Iint: Think of annual compounding, when $\left.i_{\mathrm{Nom}}=\mathrm{EAR}=\mathrm{i}_{\mathrm{PER}} .\right) \mathrm{What}$
would be wrong with your answer to parts $\mathrm{k}(1)$ and $\mathrm{k}(2)$ if you used the nominal rate, 10 percent, rather than the periodic rate, $\mathrm{i}_{\mathrm{Nom}} / 2=10 \% / 2=5 \% ?$
1. (1) Construct an amortization schedule for a $\$ 1,000,10$ percent, annual compounding loan with 3 equal installments.
(2) What is the annual interest expense for the borrower, and the annual interest income for the lender, during Year 2 ?

Eric Mockensturm
Eric Mockensturm
Numerade Educator