document.write( "Question 952144: What interest rate compounded monthly is required for an $8500 investment to triple in 5 years? \n" ); document.write( "
Algebra.Com's Answer #581485 by Alan3354(69443)\"\" \"About 
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What interest rate compounded monthly is required for an $8500 investment to triple in 5 years?
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\n" ); document.write( "5 yrs = 60 periods
\n" ); document.write( "2*Amt = Amt*(1+r)^60
\n" ); document.write( "2 = (1+r)^60 (The amount doesn't matter)
\n" ); document.write( "\"1%2Br+=+root%2860%2C2%29\"
\n" ); document.write( "1+r =~ 1.011619
\n" ); document.write( "r = 0.011609
\n" ); document.write( "r = 1.1609% per month
\n" ); document.write( "r = 13.943% per year
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