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Mathematics 14 Online
OpenStudy (anonymous):

In a certain city, electricity costs $0.19 per kW·h. What is the annual cost for electricity to power a lamp-post for 7.00 hours per day with (a) a 100.-watt incandescent light bulb (b) an energy efficient 25-watt fluorescent bulb that produces the same amount of light? Assume 1 year = 365 days.

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