document.write( "Question 928787: Find the doubling time of an investment earning 7% interest if interest is compounded continuously is ____years.\r
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Algebra.Com's Answer #563886 by ewatrrr(24785)\"\" \"About 
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A = P e ^(rt)
\n" ); document.write( "2 = e^(.07t)
\n" ); document.write( "ln(2)/.07 = t = 9.9yr
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