SOLUTION: What rate of interest compounded annually is required to double an investment in 6 years?

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Question 418770: What rate of interest compounded annually is required to double an investment in 6 years?
Answer by Alan3354(69443) About Me  (Show Source):
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What rate of interest compounded annually is required to double an investment in 6 years?
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2A = A*(1 + r)^6
(1 + r)^6 = 2
1%2Br+=+2%5E%281%2F6%29
1 + r =~ 1.1225
r =~ 12.25%