document.write( "Question 547688: if a business borrow $16,000 and repays $25,000 in 5 years what is the simple interest rate?
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Algebra.Com's Answer #356521 by mathie123(224)\"\" \"About 
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Okay so we know that the simple interest formula is
\n" ); document.write( "I=Prt where I is the interest paid, P is the principal amount, r is the rate of interest and t is the time. \r
\n" ); document.write( "\n" ); document.write( "In our case, we are not directly given the interest paid, but we can figure it out. We know that the original amount paid was $16 000 and we ended up paying $25 000. This means that we paid 25000-16000=9000 in interest ( ouch!). \r
\n" ); document.write( "\n" ); document.write( "We have our t is 5(five years) (this is assuming that the interest is annual).
\n" ); document.write( "Also our principal is 16000. \r
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\n" ); document.write( "\n" ); document.write( "That's the hard part, now just plug these values into the formula and solve for the unknown (r). \r
\n" ); document.write( "\n" ); document.write( "\"I=Prt\"
\n" ); document.write( "\"9000=16000%2Ar%2A5\"
\n" ); document.write( "\"9000=80000%2Ar\"
\n" ); document.write( "\"9000%2F80000=80000%2Ar%2F80000\"
\n" ); document.write( "\"0.1125=r\"\r
\n" ); document.write( "\n" ); document.write( "Note: Interest rates are in % and this is not so we must move the decimal point to the right two times to get the %. \r
\n" ); document.write( "\n" ); document.write( "Therefore the interest rate is 11.25% per year.
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