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Points] DETAILS PREVIOUS ANSWERS TANAPMATH7 11.3.018. Figure (a) shows a vacant lot with an 80 ft frontage in a development. To estimate its area, we introduce a coordinate system so that the x-axis coincides with the edge of the straight road forming the lower boundary of the property, as shown in Figure (b). Then, thinking of the upper boundary of the property as the graph of a continuous function fover the interval [0, 80], we see that the problem is mathematically equivalent to that of finding the area under the graph of fon [0, 80]. To estimate the area of the lot using a MY NOTES values of f(x) at x = 10, 30, 50, and 70. What is the approximate area of the lot? Riemann sum, we divide the interval [0, 80] into four equal subintervals of length 20 ft. Then, using surveyor's equipment, we measure the distance from the midpoint of each of these subintervals to the upper boundary of the property. These measurements give the Road Road ty (ft) 100 75 80 82.5 * x (ft) 10 20 30 40 50 60 70 80 4 6500 ft 2 X Need Help? Read It Watch It 12:28 AM 12/1/2023