document.write( "Question 318443: Mr. McTier invests $600 at 9% per year, and $800 at 12% per year. During what time period will the $1,400 earn between $525 and $975, inclusive, in simple interest? \n" ); document.write( "
Algebra.Com's Answer #227936 by mananth(16946)\"\" \"About 
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$600 at 9% per year,
\n" ); document.write( "Interest for 1 year = 0.09*600= $54
\n" ); document.write( "and $800 at 12% per year.
\n" ); document.write( "Interest for 1 year = 0.12*800= $ 96
\n" ); document.write( "Total for 1 year = $150
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\n" ); document.write( "$150 1 year
\n" ); document.write( "For $525 --- 525/150 = 3.5 years
\n" ); document.write( "..
\n" ); document.write( "975 /150 = 6.5 years
\n" ); document.write( "..
\n" ); document.write( "Time frame is 3.5 years to 6.5 years
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