Question: A 70-wan outdoor security light hums, on average. 10 hours a day, A new- bulb costs $5.00. and the lifetime is about 1.000 hours. If

A 70-wan outdoor security light hums, on average. 10 hours a day, A new- bulb costs $5.00. and the lifetime is about 1.000 hours. If electricity costs $0.10 per kW-hour, what is the yearly price of "security." per light?

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