Posted by **Anonymous** on Monday, November 12, 2012 at 11:05pm.

John invests $2500 in an account that pays a rate r compounded annually. If after 2 years the total interest earned is $650, find the approximate rate of interest

- college algebra -
**Reiny**, Monday, November 12, 2012 at 11:34pm
let the rate be i, where i is expressed as a decimal

2500(1+i)^2 = 2500+650

(1+i)^2 = 3150/2500 = 1.26

take √ of both sides

1+i = √1.26

1+i = 1.12249

i = .12249

or 12.25% , Wow, I remember those good old days

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