SOLUTION: Commonwealth Edison company's charge for electricity in January 2010 is 9.44¢ (cents) per kilowatt-hour. In addition, each monthly bill contains a customer charge of $12.55. If las
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Question 1093222: Commonwealth Edison company's charge for electricity in January 2010 is 9.44¢ (cents) per kilowatt-hour. In addition, each monthly bill contains a customer charge of $12.55. If last year's bills ranged from a low of $76.27 to a high of $248.55, over what range did usage vary (in kilowatt-hours)?
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
Let = number of kw-hrs for low range of monthly bills
Let = number of kw-hrs for high range of monthly bills
------------------------------
and
The range of usage is:
6.75 kw to 236 kw
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