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Gilbert Strang, Calculus, 3rd edition (Wellesley-Cambridge Press; MIT OpenCourseWare RES.18-001) §5.1 The Idea of the Integral, #18 · Calculus · Integrals

The rectangles of heights … give a total estimated expense of ____

This problem is about a company whose expense rate $v (x) = 6 - x$ is decreasing.

The rectangles of heights $6, 5, 4, 3, 2, 1$ give a total estimated expense of ____. Draw them enclosing the triangle to show why this total is too high.

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Gilbert Strang, Calculus, 3rd edition (Wellesley-Cambridge Press; MIT OpenCourseWare RES.18-001) · §5.1 The Idea of the Integral, #18

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