SOLUTION: The cost of operating an appliance varies jointly the number of watts drawn, the hours of operation and the cost per kilowatt-hour. At 1.75 per kilowatt-hour, how much would it cos
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Question 987133: The cost of operating an appliance varies jointly the number of watts drawn, the hours of operation and the cost per kilowatt-hour. At 1.75 per kilowatt-hour, how much would it cost when a 500-watt waffle iron operates for 45 minutes? Found 2 solutions by CubeyThePenguin, ikleyn:Answer by CubeyThePenguin(3113) (Show Source):