# SOLUTION: find the annual intrest rate if an investment of \$4000 earns \$75 in intrest over 3 years

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 Question 616104: find the annual intrest rate if an investment of \$4000 earns \$75 in intrest over 3 yearsAnswer by ewatrrr(10682)   (Show Source): You can put this solution on YOUR website! ``` Hi, In General A = Accumulated Amount \$4075 P= principal = \$4000 r= annual rate = r n= periods per year = 1 t= years = 3 log(1.01875) = 3log(1+r) log(1.01875)/3 = .0027 = log(1+r) .0062 = r OR Interest rate is .62% ```