Posted by Anonymous on Tuesday, May 24, 2011 at 5:44am.
(1+i)^15 = 3
log both sides
log((1+i)^15) = log3
15 log (1+i) = log3
log 1+i = log3/15
1+i = 1.07598
i = .07598
You would have to earn about 7.6 % a year to triple your money in 15 years
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