document.write( "Question 1179786: An oven rated at 750 W is switched on for 45 minutes per day. A refrigerator is rated at 2500 w and is on 8 hours per day. How much does it cost to operate BOTH the fridge and oven for 1 year if the price is $0.157 / kWh? (Include $ sign with no space and if necessary, round to two decimal places)/ \n" ); document.write( "

Algebra.Com's Answer #809373 by ikleyn(52777) $\"\"$ $\"About$

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document.write( "The used energy per day is\r\n" );
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document.write( "    750*0.75 + 2500*8 = 20562.5 watts-hours,  or   20.5625 kilowatts-hours.\r\n" );
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document.write( "(Here 0.75 stands for 45 minutes = 3/4 of an hour).\r\n" );
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document.write( "The used energy per year is  20.5625 kWh * 365  days.\r\n" );
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document.write( "The cost per year is  0.157 * 20.5625 * 365  dollars.\r\n" );
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document.write( "Use your calculator.\r\n" );
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