document.write( "Question 1198824: An investment pays simple interest, and triples in 13 years. What is the interest rate?
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Algebra.Com's Answer #832477 by ikleyn(52797) $\"\"$ $\"About$

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document.write( "    3A  = A*(1+r*13)\r\n" );
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document.write( "    3   =    1 + 13r\r\n" );
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document.write( "    13r =    2\r\n" );
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document.write( "      r =    2/13 = 0.153846154 = 15.38%   (rounded).    ANSWER\r\n" );
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\n" ); document.write( "\n" ); document.write( "To see many other similar (and different) solved problems on simple interest accounts, look into the lesson\r
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\n" ); document.write( "\n" ); document.write( "Learn the subject from there.\r
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