document.write( "Question 967199: How many years will it take to for 54,321 invested at compound interest of 13% per annum, to amount to 98,765? \n" ); document.write( "
Algebra.Com's Answer #591205 by ankor@dixie-net.com(22740)\"\" \"About 
You can put this solution on YOUR website!
How many years will it take to for 54,321 invested at compound interest of 13% per annum, to amount to 98,765?
\n" ); document.write( ":
\n" ); document.write( "let t = no. yrs for this to happen
\n" ); document.write( "54231*(1.13^t) = 98765
\n" ); document.write( "1.13^t = \"98765%2F54231\"
\n" ); document.write( "1.13^t = 1.821191
\n" ); document.write( "log(1.13^t) = log(1.821191)
\n" ); document.write( "log equiv of exponents
\n" ); document.write( "t*log(1.13) = log(1.821191)
\n" ); document.write( "t = \"log%281.821191%29%2Flog%281.13%29\"
\n" ); document.write( "using your calc
\n" ); document.write( "t = 4.9 yrs
\n" ); document.write( "
\n" ); document.write( "
\n" );