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paul morales

paul m.

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Question 2 (11 marks) In a company, the original monthly salary of employees is normally distributed approximately with a mean of $25000 and a standard deviation of $4500. After the New Year holiday, the boss would like to adjust upward the monthly salary to retain his employees by giving a 15% incremental increase to all employees. In addition, a further $1000 per month will be given to them as well. (a) Express the adjusted monthly salary (Y) in terms of the original monthly salary (X). Hence, find the expected value and standard deviation of the adjusted monthly salary. (b) Using the results in (a) to calculate the probability that the adjusted monthly salary is more than $30000. (c) Determine the interval of adjusted monthly salary covering the middle 80% of employees.

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During the sixth month of pregnancy, a client reports intermittent earaches and a constant feeling of fullness in the ears. What would the nurse expect is the likely cause of these symptoms? Increasing progesterone levels An ear infection A serious neurologic disorder Eustachian tube vascularization

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How can the following equilibrium be shifted to the right? $N_2(g) + 3H_2(g) \rightleftharpoons 2NH_3(g)$ Select the correct answer below: Decrease the volume of the vessel. Increase the volume of the vessel. Add a non-reactive gas. More information is needed.

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Question 23 Consider the following chart. What is the marginal product of labor (MPL) of the fifth worker? Land (20 Acres) (1) Labor (Workers) (2) Total Product (Pounds) (3) Marginal Product of Labor (MPL) (4) 20 acres 0 0 20 acres 1 50 +50 20 acres 2 130 +80 20 acres 3 220 +90 20 acres 4 300 +80 20 acres 5 370 20 acres 6 390 +20 20 acres 7 380 -10 +40 +70 +80 +50

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What does a prezygotic barrier do? What are some prezygotic barriers?

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• Find an equivalent integral in cylindrical coordinates 2? ?/3 2 to \int_0^{2\pi} \int_0^{\pi/3} \int_{\sec \phi}^2 \rho \sin \phi \,d\rho \,d\phi \,d\theta in spherical coordinates. (a) \int_0^{2\pi} \int_0^2 \int_1^2 r\sqrt{z^2 + r^2} \,dz \,dr \,d\theta 2? ?3 ?4?r2 (b) \int_0^{2\pi} \int_0^{\sqrt{3}} \int_0^{\sqrt{4-r^2}} r\sqrt{z^2 + r^2} \,dz \,dr \,d\theta 2? 2 ?4?r2 (c) \int_0^{2\pi} \int_0^2 \int_1^{\sqrt{4-r^2}} r \,dz \,dr \,d\theta 2? ?3 ?4?r2 r (d) \int_0^{2\pi} \int_0^{\sqrt{3}} \int_1^{\sqrt{4-r^2}} \frac{r}{\sqrt{z^2 + r^2}} \,dz \,dr \,d\theta 2? 2 ?4?r2 r (e) \int_0^{2\pi} \int_{\sqrt{3}}^2 \int_1^{\sqrt{4-r^2}} \frac{r}{\sqrt{z^2 + r^2}} \,dz \,dr \,d\theta

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Which of the following accurately describes tidal volume? a.) The amount of air that can be forcefully exhaled after a normal exhalation. b.) The varying amounts of air within the lung at a given time. c.) The amount of air that normally enters the lungs during quiet breathing d.) The air space present in the airway that never reaches the alveoli and therefore never participates in gas exchange.

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Part II. Solve all problems. 1. In a lattice, concentration of electrons in the energy interval E, E+dE is given by Find concentration of conduction electrons in an intrinsic semiconductor around room temperature. Assume forbidden energy gap to be ΔE. HINT: Around room temperature kT << E-EF. 2. A parent nucleus with λ1 decay constant decays into a radioactive daughter nucleus of decay constant λ2. Suppose the number of parent nuclei is N16 at time t=0 and the number of daughter nuclei is zero at that time. (a) Find the number of daughter nuclei as a function of time: (b) The half-life of 218Po parent nucleus is 3.11 min, while its daughter nucleus 2114Pb decays with a half-life of 26.8 min. At what time is the number of 214Pb maximum? 3. A nucleus x B decays into a nucleus Y. In a special case, with x exactly at rest the electron happens to be also exactly at rest. (a) Find an exact expression for the antineutrino energy in terms of masses of the nuclei and the electron. (b) Show that the antineutrino takes almost all available kinetic energy. (d) Find the fractional error in (b) for a typical case with nuclei mass of about 200 u and their mass difference of 0.0015 u. 4. Concentration of ions in an ion chamber varies in time according to a second-order reaction. An exposure to radiation produced the same concentration of positive and negative ions. If α is the recombination coefficient, find (a) concentration of ions as a function of time by direct integration of an appropriate differential equation: (b) The chamber filled with air at 20°C, 1 atm is exposed instantaneously to 0.50R. Find the time at which charge produced by the exposure drops to half of the initial value. At the specified T and p, α = 1.60 x 10^4 cm^3/s. 1 R = 3.33 x 10^-16 C/cm^3 of dry air at STP. Part II. Solve ANY TWO problems. 5. In a lattice, concentration of electrons in the energy interval E, E + dE is given by Z8 El/2 nE)dE= dE h3 Find concentration of conduction electrons in an intrinsic semiconductor around room temperature. Assume forbidden energy gap to be E. HINT: Around room temperature kg 7 << E - Ep - b. A parent nucleus with decay constant decays into a radioactive daughter nucleus of decay constant 2. Suppose the number of parent nuclei is Nio at time t = 0 and the number of daughter nuclei is zero at that time. (a) Find the number of daughter nuclei as a function of time; decays with a half-life of 26.8 min. At what time is the number of 2iPb maximum? A nucleus X decays into a nucleus Y. In a special case, with X exactly at rest the electron happens to be also exactly at rest. (a) Find an exact expression for the antineutrino energy in terms of masses of the nuclei and the electron. (b) Show that the antineutrino takes almost all available kinetic energy. (d) Find the fractional error in (b) for a typical case with nuclei mass of about 200 u and their mass difference of 0.0015 u. Concentration of ions in an ion chamber varies in time according to a second-order reaction. An exposure to radiation produced the same concentration of positive and negative ions. If is the recombination coefficient, find (a) concentration of ions as a function of time by direct integration of an appropriate differential equation; b The chamber filled with air at 20°C, 1 atm is exposed instantaneously to 0.50 R Find the time at which charge produced by the exposure drops to half of the initial value. At the specified T and p, = 1.60 x 10 cm/s. 1 R = 3.33 x 10T C/cm of dry air at STP. 69.7232 72.59[33 74.92|34 78.96[35 79.9036 83.80 31 Ge As Se Br Kr Ga Germanium Arsenic Selenium Bromine Krypton 3d"4g'4p 344p 3d4p 3d44g 3d4s4p* 34s4p 114.82] 50 118.6951 121.75 52 127.6053 126.954 131.30 49 Sn Sb Te - Xe In Indium Tin Antimony Tellurium Iodine Xenon 4d"Ss"5p' 4d"ss5p 4d5s'5p* 4d"5s'5p 4d"*ss'5p 204.3782 207.283 208.9884 20985 222 81 T1 Pb Bi Po At Rn Astatine Lead Polonium Astatine Radon d9,9PS,d9,9PS,d9,9_PS rs6s6p

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CH 01HW - Exercises & Problems (i) Part 2 of 3 1 point Required information Tableau Dashboard Activity: Interpret and Communicate 1-2 (Static) [Exercise 1-15; LO1-6] The Alpine House, Incorporated, is a large retailer of snow skis that has assembled the information shown below for the quarter ended March 31: able[[,Amount],[Sales,$150,000 CH 01 HW Exercises Problems Required information Tableau Dashboard Activity: Interpret and Communicate 1-2 Static [Exercise 1-15; LO1-6] The Alpine House, Incorporated, is a large retailer of snow skis that has assembled the information shown below for the quarter ended March 31: Part 2 of 3 points Sales Selling price of skis Variable selling expense per pair of skis Variable administrative expense per pair of skis Total fixed selling expense $150,000 $750 $50 $10 $20,000 $26,000 $30,000 $40,000 $100,000 Beginning merchandise inventory Ending merchandise inventory Merchandise purchases 6 The company used the above data to create traditional and contribution format income statements for the quarter ended March 31. To depicted income statements using the data visualizations shown below. The company would like your assistance in interpreting these visualizations. Review the Tableau visualizations below by clicking on the gray tabs reading Traditional Format Income Statement and Contribution Format Income Statement and then answer the questions that follow. Traditional Format Income Statement Account Sales Cost of Goods Sold Gross Margin Selling Expenses Administrative Expenses Net Operating $150,000 Cost of Goods Sold Gross Margin $150,000 $0 $20,000 $40,000 $60,000 $80,000 $100,000 $120,000 $140,000 Amount Tableau Tableau Dashboard Activity 1-2 Static Part 2 2. Based on a review of the data visualizations, why is the contribution margin less than the gross margin? A. The traditional approach includes selling and administrative expenses when calculating gross margin whereas the contribution approach excludes selling and administrative expenses when calculating contribution margin. B. The contribution approach subtracts variable selling and administrative expenses as well as cost of goods sold from sales when calculating the contribution margin whereas the traditional approach excludes selling and administrative expenses when calculating gross margin. C. The traditional approach subtracts variable selling and administrative expenses (as well as cost of goods sold) from sales when calculating contribution margin whereas the contribution approach excludes selling and administrative expenses when calculating gross margin. D. The contribution approach subtracts variable selling and administrative expenses (as well as cost of goods sold) from sales when calculating the gross margin whereas the traditional approach excludes selling and administrative expenses when calculating contribution margin. Option A Option D

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Which of the following statements is false? Money must change hands before a cost can be incurred. No monetary payment takes place when an implicit cost is incurred. Costs may be either explicit costs or implicit costs. Cost implies that a sacrifice has been made. Question 2 Econom

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