document.write( "Question 1109898: suppose you invest $4300 in an account that ears 6% intrest, and you let it grow for 12 years. About how much would you expect to have after those 12 years? Use rule 72. \n" ); document.write( "
Algebra.Com's Answer #724864 by josgarithmetic(39617)\"\" \"About 
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6% for 12 years,...
\n" ); document.write( "Assuming continuous compounding\r
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\n" ); document.write( "\n" ); document.write( "\"4300%2Ae%5E%2812%2A0.06%29\"\r
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\n" ); document.write( "\n" ); document.write( "\"8834\"\r
\n" ); document.write( "\n" ); document.write( "--\r
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\n" ); document.write( "\n" ); document.write( "If you are asking for the use of Rule of 72, then the doubling time is what is expected to be estimated.\r
\n" ); document.write( "\n" ); document.write( "t, the time to double
\n" ); document.write( "r, the percent growth rate, AS PERCENT\r
\n" ); document.write( "\n" ); document.write( "\"t=ln%282%29%2Fln%281%2Br%2F100%29=approximately=72%2Fr\"\r
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\n" ); document.write( "\n" ); document.write( "but your question was, \"about how much would you expect to have after those 12 years\"; nothing about doubling was asked.\r
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\n" ); document.write( "\n" ); document.write( "\"t=72%2F6\"\r
\n" ); document.write( "\n" ); document.write( "\"t=12\"------the estimated time for doubling using this approximation rule is about 12 years.
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