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How long does it take for an investment to double in value if it is invested 8% per annum compounded monthly? Compounded continuously? It's number 29.

How long does it take for an investment to double in value if it is invested 8% per-example-1
User Nazila
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2p=p(1+0.08/12)^12t
T=[log(2)/log(1+0.08/12)]/12
T==8.7 years
User Achilles
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