document.write( "Question 379259: Suppose you invested $1200 for four years. You earned $312 in simple interest. What is the interest rate? \r
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Algebra.Com's Answer #269292 by rfer(16322)\"\" \"About 
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I=Pr
\n" ); document.write( "r=I/P
\n" ); document.write( "r=(312/4)/1200
\n" ); document.write( "r=78/1200
\n" ); document.write( "r=0.065=6.5%
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