One family's bills for electric usage are shown below:
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1 |
2436 |
$ 114.27 |
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2 |
4116 |
175.71 |
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3 |
2475 |
114.70 |
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4 |
2968 |
145.96 |
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5 |
1788 |
93.54 |
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6 |
1883 |
101.12 |
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7 |
1807 |
145.33 |
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8 |
2098 |
165.60 |
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9 |
1683 |
135.19 |
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10 |
1872 |
148.38 |
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11 |
3573 |
156.99 |
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12 |
2044 |
106.14 |
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13 |
1829 |
99.32 |
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14 |
2497 |
121.86 |
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1. Some electric companies offer a "level payment plan " to their customers.
With the level payment plan, the customer's bill each month is the average
of the previous 12 months (including the current month). Using this plan,
how much would the customer above pay during:
the 12th month?
the 13th month?
the 14th month?
2. Calculate the average cost per KWH for the 14 months listed above.
3. Compare the cost of using an incandescent bulb to the cost of using a fluorescent bulb of equivalent brightness over a two year time period. Use the attached sheets as a source of information and a guide for calculating this. Write a paragraph explaining your comparison and the results.
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STUDENTS SCORE |
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COMPUTING AND CALCULATING |
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WRITING |
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EHS GRADUATE COMPUTING/CALCUL |
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COLLABORATIVE WORKING |
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TOTAL |
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© 1998 Elmwood Jr/Sr High School