document.write( "Question 1108965: The annual interest on a $19,000 investment exceeds the interest earned on a $5000 investment by $617. The $19,000 is invested at a 0.3% higher rate of interest than the $5000. What is the interest rate of each investment? \n" ); document.write( "

Algebra.Com's Answer #724012 by josmiceli(19441) $\"\"$ $\"About$

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This is a simple interest problem
\n" ); document.write( "Use $\"+I+=+P%2Ar%2At+\"$
\n" ); document.write( "-----------------------
\n" ); document.write( "(1) $\"+I+%2B+617+=+19000%2A%28+r+%2B+.003+%29%2A1+\"$
\n" ); document.write( "(2) $\"+I++=+5000%2Ar%2A1+\"$
\n" ); document.write( "----------------------------------
\n" ); document.write( "Plug (2) into (1)
\n" ); document.write( "(1) $\"+5000r+%2B+617+=+19000r+%2B+57+\"$
\n" ); document.write( "(1) $\"+14000r+=+560+\"$
\n" ); document.write( "(1) $\"+r+=+.04+\"$
\n" ); document.write( "and
\n" ); document.write( " $\"+r+%2B+.003+=+.043+\"$
\n" ); document.write( "------------------------
\n" ); document.write( "The rate for $19,000 investment is 4.3%
\n" ); document.write( "The rate for $5,000 investment is 4%
\n" ); document.write( "----------------------------------------
\n" ); document.write( "check:
\n" ); document.write( "(1) $\"+I+%2B+617+=+19000%2A.043+\"$
\n" ); document.write( "(1) $\"+I+=+817+-+617+\"$
\n" ); document.write( "(1) $\"+I+=+200+\"$
\n" ); document.write( "and
\n" ); document.write( "(2) $\"+I+=+5000%2A.04+\"$
\n" ); document.write( "(2) $\"+I+=+200+\"$
\n" ); document.write( "OK
\n" ); document.write( " \n" ); document.write( "

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