Question 979326
solve for r, A=P (1+r)^t
A/P = (1+r)^t
(A/P)^(1/t) = 1+r 
r = (A/P)^(1/t) - 1
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1) r = (60000/20000)^(1/5) - 1 = 0.24573094 approx 0.25
2) r = (75345.75/35000)^(1/5) - 1 = 0.165730456 approx 0.17