Posted by **Ethan** on Wednesday, November 9, 2011 at 1:47pm.

The widths (in meters) of a kidney-shaped swimming pool were measured at 3-meter intervals as indicated in the figure. Use the Midpoint Rule with n = 4 to estimate the area S of the pool if a1 = 15.5, a2 = 18, a3 = 17, a4 = 14, a5 = 12.5, a6 = 12, and a7 = 12.

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