Physics

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HELP WITH c.!!!

A electric bill showed 1200 kilowatt hours (kWh) purchased at a cost of \$150.00.

a. What does PECO charge per kWh? \$0.125

b. An electric dryer is rated at 5400 W. It takes 40 minutes to dry a normal load. What is the cost per load? \$0.45

c. Two 100 watt security lights are left on for 8 hours each night. What is the annual electricity cost? \$_____

• Physics -

2*100W*8hr/day = 1600 W-hr/day * 365day/yr = 584kWh/yr * \$150/1200kWh = \$73/yr

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