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Mathematics, 21.07.2019 19:30 katelynbychurch
The cost of running an appliance varies jointly as the number of watts used, the hours of operation, and the cost per kilo-watt hour. a 6000 watt convection oven operates for 10 minutes for 15 cents at a cost of 7.5 cents per kilo-watt hour. what is the cost of cooking two meals if each meal takes 70 minutes to make?
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