document.write( "Question 1072783: what is the rate percent p.a. of a sum of money which doubles in 17 years at compound interest? \n" ); document.write( "
Algebra.Com's Answer #687632 by josgarithmetic(39617)\"\" \"About 
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One-year compounding period
\n" ); document.write( "17 years to double the investment
\n" ); document.write( "r, the rate as a decimal value\r
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\n" ); document.write( "\n" ); document.write( "\"2=1%2A%281%2Br%29%5E17\"\r
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\n" ); document.write( "\n" ); document.write( "\"log%28%282%29%29=17%2Alog%28%281%2Br%29%29\"\r
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\n" ); document.write( "\n" ); document.write( "\"r=0.0416\" or 4.16%
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