When asked to write the meaning, write the meaning of your results using complete sentences with correct units. Round to one decimal place if necessary. 1. The figure shows the power consumption in the city of San Francisco for a day in September. P is measured in megawatts and t is measured in hours starting at midnight. For this problem you will be estimating the area under the curve for the 24-hour period using 4 subintervals, and right rectangles. a) Determine At. P. 800 b) Sketch the four rectangles on the graph and shade them. 600 c) Calculate the area of each rectangle. 400 d) Calculate R4. Write the meaning. 200 3 6 9 12 15 18 21 Pacific Gas & Electric

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