Electricity Rates Commonwealth Edison Company’s summer charge for electricity is 7.782¢. per kilowatt-hour. In addition, the monthly bill contains a customer charge of $8.49. If last summer’s bills ranged from a low of $63.74 to a high of $127.55, over what range did usage vary (in kilowatt-hours)?
Source: Commonwealth Edison Co., Chicago, Illinois, 2011.
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