document.write( "Question 1109514: Two certificates of deposit pay interest at rates that differ by 4%. Money invested for one year in the first CD earns $120 interest. The same principal invested in the other CD earns $200. Find the two rates of interest. \n" ); document.write( "
Algebra.Com's Answer #724513 by jorel1380(3719)\"\" \"About 
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Let 2000 be the amount of principal invested. Let n/100 be the rate of interest on the first CD and n+4/100 be the amount paid on the second CD. Then:
\n" ); document.write( "2000(n/100)=120
\n" ); document.write( "2000(n+4/100)=200
\n" ); document.write( "20n=120
\n" ); document.write( "20n+80=200
\n" ); document.write( "n=6
\n" ); document.write( "n+4=10
\n" ); document.write( "If 2000 was deposited at 6%, and another 2000 was invested at 10%, then you would have 120 and 200 interest at their respective rates
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