document.write( "Question 1188753: By your cell phone contract, you pay a monthly fee plus some money for each minute you use the phone during the month. In one month, you spent 280 minutes on the phone, and paid $29.40. In another month, you spent 400 minutes on the phone, and paid $36.00. What is the rate (in dollars per minute) that the phone company is charging you? \n" ); document.write( "

Algebra.Com's Answer #819930 by ikleyn(52788) $\"\"$ $\"About$

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\n" ); document.write( "\n" ); document.write( "To find the rate, take the difference of money, $36.00 - $29.40, and divide it by 400-280 = 120, the difference of minutes.\r
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\n" ); document.write( "\n" ); document.write( "When you take the difference of money, you cancel the monthly fees, so this difference is paid for 120 minutes.\r
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\n" ); document.write( "\n" ); document.write( "When you divide the difference of money by 120 minutes, you get the rate per minute.\r
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