We can use the Future value of sum formula to calculate the annual interest rate. | |||||||
FV = P x (1+r)^n | |||||||
FV = Future value of investment = $2009.48 | |||||||
P = Investment amount = $490 | |||||||
r = annual interest rate = ? | |||||||
n = number of compounding periods = 13 | |||||||
2009.48 = 490 x (1+r)^13 | |||||||
4.10098 = (1+r)^13 | |||||||
r = 0.1146 | |||||||
Annual Interest rate = 11.46% | |||||||
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