A cell phone charger is rated for 0.4 amps. It takes 90 minutes to get a full charge. How much does it cost to charge the phone if the cost of electricity is $0.15/kWh?
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A cell phone charger is rated for 0.4 amps. It takes 90 minutes to get a full charge. How much does it cost to charge the phone if the cost of electricity is $0.15/kWh?
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