When interest is compounded continuously, the amount of money increases at a rate proportional to the amount S present at time t, that is, dS/dt = rS, where r is the annual rate of interest.
(a) Find the amount of money accrued at the end of 5 years when $8000 is deposited in a savings account drawing 5 3/4 % annual interest compounded continuously. (Round your answer to the nearest cent.)
$
X
(b) In how many years will the initial sum deposited have doubled? (Round your answer to the nearest year.)
12
years
(c) Use a calculator to compare the amount obtained in part (a) with the amount S = 8000(1 + 1/4(0.0575))^5(4) that is accrued when interest is compounded quarterly. (Round your answer to the nearest cent.)
S = $
x