Electrical power.....?
What is the cost of operating a 1500 W electrical heater for 6 hours each day for three months (winter), assuming that the electricity company charges 10c per kW hour.
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Umm, don't you have a calculator?
1500W/1000W=1.5kW*10c=15c*6hr=90c/100c=$0.90*30=$27*3=$81
So $81 for the winter.