i got 7651.823 instead of what's in the answer choices, so what am i doing wrong?

A grandmother deposited $4,000 in an account that pays 5% per year compounded annually when her granddaughter was born. What will the value of the account be when the granddaughter reaches her 13th birthday?
a) $7,552.60
b) $7,502.60
c) $7,562.60
d) $7,542.60
e) $7,582.60

Question

i got 7651.823 instead of what's in the answer choices, so what am i doing wrong?

A grandmother deposited $4,000 in an account that pays 5% per year compounded annually when her granddaughter was born.  What will the value of the account be when the granddaughter reaches her 13th birthday?
a) $7,552.60
b) $7,502.60
c) $7,562.60
d) $7,542.60
e) $7,582.60

anonymous · Answer

FutureValue = StartingValue(r/n +)nt 

    FutureValue = future value of the investment
    StartingValue = Starting deposit
    r = interest rate
    n = times annually interest is compunded
    t = years of the investment

total value including interest . $7542.60

anonymous · Answer

i don't get why you wrote +)nt  in the formula. what are you adding with?