document.write( "Question 160571: What simple interest rate will Susan need to secure to make $2,500 in interest on a $10,000 principal over 5 years? \n" ); document.write( "
Algebra.Com's Answer #118452 by checkley77(12844)\"\" \"About 
You can put this solution on YOUR website!
10000(1+x)^5=12500
\n" ); document.write( "10000(1+x)^5=12500
\n" ); document.write( "(1+x)^5=12500/10000
\n" ); document.write( "(1+x)^5=1.25
\n" ); document.write( "(1+x)=5thrt1.25
\n" ); document.write( "1+x=1.0456
\n" ); document.write( "x=1-1.0456
\n" ); document.write( "x=.0456 or 4.56% is the required interest rate.
\n" ); document.write( "Proof:
\n" ); document.write( "10000(1+.0456)^5=12500
\n" ); document.write( "10000(1.0456)^5=12500
\n" ); document.write( "10000*1.25=12500
\n" ); document.write( "12500=12500\r
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