Surveying In Exercises 31 and 32, use the Trapezoidal Rule to estimate the number of square feet of land in the lot, where x and y are measured in feet, as shown in the figure. The land is bounded by a stream and two straight roads. (The number of subintervals is shown in the figure.)

0  100  200  300  400  500  

125  125  120  112  90  90  

600  700  800  900  1000  
y  95  88  75  35  0 
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