SOLUTION: In North Carolina, Duke Energy charges $42.41 plus $0.092897 for each additional kilowatt hour (kwh) used during the months from July through October for usage in excess of 350 kwh

Algebra ->  Coordinate Systems and Linear Equations  -> Linear Equations and Systems Word Problems -> SOLUTION: In North Carolina, Duke Energy charges $42.41 plus $0.092897 for each additional kilowatt hour (kwh) used during the months from July through October for usage in excess of 350 kwh      Log On


   

Question 1092776: In North Carolina, Duke Energy charges $42.41 plus $0.092897 for each additional kilowatt hour (kwh) used during the months from July through October for usage in excess of 350 kwh. Suppose one homeowner’s electric bill ranged from a low of $88.86 to a high of $137.16 during this time period. Over what range (in kwh) did the usage vary?
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Answer by Boreal(15235) About Me  (Show Source):
You can put this solution on YOUR website!
88.86-42.41=46.45
divide that by 0.092897=500.01 or 500 kwh, so total 850 kwh.
137.16-42.41=94.75
divide that by 0.092897=1019.94 or 1020 kwh, so total 1370 kwh
(850, 1370)