Posted by **Mike** on Tuesday, December 7, 2010 at 12:02pm.

Consumers pay for electricity by the kilowatt-hour (the amount of electricity used by a 1,000-watt appliance in one hour). If electricity costs 10cents per kilowatt-hour, what is the cost of running a 100-watt lamp for

1. 1 hour?

2. 24 hours?

3. 1 year?

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