1. The problem statement, all variables and given/known data In 1903, a Picasso painting was purchased for $600. The family of the original owner sold the painting in 1995 for $29,152,000. What rate of return (interest) did the family receive on the investment? 2. Relevant equations Single Payment Compound Interest Formula: F = P(1+i)n where, F= a future some of money (future value) P= a present sum of money n= number of interest periods i = interest rate per interest period. 3. The attempt at a solution solve for i: F = P(1+i)n F/P = (1+i)n log(F/P) = n log (1+i) This is as far as I get. I know that n log (1+i) does not equal n log 1 + n log i, but I don't know what to do to isolate the i. I can't just divide both sides by n log because there is no such thing as n log. I thought about moving n log (1+i) to the left side and setting the equation to zero, but I didn't get anywhere with that either.