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Cynthia began to draw midpoint rectangles to approximate the area under the curve for −2 ≤ x ≤ 4 given f(x) = x3 x2 x + 3. Trace Cynthia’s graph and finish drawing the remaining four midpoint rectangles. Then, compute the estimated area. Homework Help ✎

Make the remaining rectangles. Then calculate the areas of each rectangle and add them together to find A(f, −2 ≤ x ≤ 4).

The width of all of the rectangles is