SOLUTION: what is the rate percent p.a. of a sum of money which doubles in 17 years at compound interest?

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Question 1072783: what is the rate percent p.a. of a sum of money which doubles in 17 years at compound interest?
Answer by josgarithmetic(39616) About Me  (Show Source):
You can put this solution on YOUR website!
One-year compounding period
17 years to double the investment
r, the rate as a decimal value

2=1%2A%281%2Br%29%5E17

log%28%282%29%29=17%2Alog%28%281%2Br%29%29

r=0.0416 or 4.16%