Question: Find 4 0 (2x + 3) dx by using the formula for the area of a trapezoid: A =(1/2)(B + b)h, where B and

Find ∫⁴₀ (2x + 3) dx by using the formula for the area of a trapezoid: A =(1/2)(B + b)h, where B and b are the lengths of the parallel sides and h is the distance between them. Compare with Exercise 43.

Exercise 43

Approximate the area under the graph of ƒ(x) = 2x + 3 and above the x-axis from x = 0 to x = 4 using four rectangles. Let the height of each rectangle be the function value on the left side.

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