Question #5 C11: "Related Rates." A man starts walking south at 5 ft/s from a point P. Thirty minute later, a woman starts waking north at 4 ft/s from a point 100 ft due west of point P. At what rate are the people moving apart 2 hours after the man starts walking?

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A: Take a partial fraction

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A: we have to solve integration.

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A: We need to use the knowledge of binomial theorem to solve this problem.

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A: Please refer to the image below

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