A passbook savings account pays a nominal rate of 7% on savings deposits. Find the effective annual yield if the interest is compounded 1000 times per year.
The effective annual yield is %
(Type an integer or decimal rounded to the nearest tenth as needed)|||The compound interest formula is A = P(1 + r/n)^(n*t)
where
A = future amount
P = present amount
r = interest rate (as a decimal)
n = number of compounding periods per year
So, A and P aren't needed here.
r = .07, n = 1000, t = 1
So, we get (1+.07/1000)^1000 = 1.0725.
The effective annual yield is 7.25% (to the nearest tenth 7.3%)
|||(1 + .07/1000)^1000 - 1 = .0725. or 7.3%|||A = P(0)(1 + r/n)^(nt)
where P(0) is the initial deposit
r is the annual interest rate as a decimal
n is the numer of compounding periods / year
t is the number of years
for your problem, A = P(0) (1 + .07/1000)^(1000*1)
A = P(0)(1.00007)^1000 = P(0)(1.0725)
so after one year, your investment will be worth 7.25% the original investment, which is the effective yield of the account:
effective interest is 7.25% (7.3% rounded to the nearest tenth)
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