At 15% interest compounded annually,approximately how long will it take Walter to double his money?
A) About five years
B) About three years
C) About seven years
D) About fifteen years
E) About fifty years

Name: At 15% interest compounded annually,approximately how long will it take Walter to double his money? A) About five years B) About three years C) About seven years D) About fifteen years E) About fifty years
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Using a financial calculator:
I/Y = 15, PV = -1, PMT = 0, FV = 2, cpt N = 4.96

At 15% Interest Compounded Annually,approximately How Long Will It Take