A power company charges $0.12 per kilowatt-hour (k Wh) and $14.89 in monthly taxes. The monthly charge C (in $) is given by C = 0.12 h + 14.89 where h is the number of kilowatt-hours used. If a faimily’ bill comes 5o 4137m77, determine the number of kilowatt-hours used.

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