document.write( "Question 956983: A man invests £20000 with a guaranteed compound interest rate of 4%. How long will it be before he has double his money \n" ); document.write( "
Algebra.Com's Answer #584711 by Fombitz(32388)\"\" \"About 
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\"40000=20000%281.04%29%5En\"
\n" ); document.write( "\"1.04%5En=2\"
\n" ); document.write( "\"n=log%28%282%29%29%2Flog%28%281.04%29%29\"
\n" ); document.write( "\"n=17.7\"\"yr\"
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