Surveying 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.) Road y 80 60+ Stream 40 20 + Road x 20 40 60 80 100 120 10 20 30 40 50 60 70 80 90 100 110 120 y 75 81 84| 76 67 68 69| 72 68 56 42 23 sq ft

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Differential Equations

Have you ever observed the movement of the satellites and rockets or how the planets go around the sun in their orbits? How will you determine their motion? Definitely they follow some scientific laws and these kinds of problems are framed as differential equations.