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) You can put this solution on YOUR website! 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 \n" ); document.write( "☺☺☺☺\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " |