18 The Graph Below Shows A Citys Daily Rate Of

Question

18. The graph below shows a city's daily rate of use of electricity (in millions of kilowatts). Estimate the total daily usage of electricity by summing the area of rectangles. Use the left endpo…

18. The graph below shows a city's daily rate of use of electricity (in millions of kilowatts). Estimate the total daily usage of electricity by summing the area of rectangles. Use the left endpoints, then the right endpoints, then give the average of those results as the answer. Let the width of each rectangle be 6 hours 12 Midnight 4 A.M. 8 A.M. Noon 4 P.M. 8 P.M. Midnight The estimate of the city's total daily usage of electricity for the given day, found by averaging the estimates using left and right endpoints, is (A) less than 100 million kw-hrs (B) between 100 million kw-hrs and 140 million kw-hrs (C) between 140 million kw-hrs and 180 million kw-hrs (D) between 180 million kw-hrs and 220 million kw-hrs (E) more than 220 million kw-hrs

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