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Suppose that two boats leave a dock at different times. One heads due north, the other...

Suppose that two boats leave a dock at different times. One heads due north, the other due east. Find the rate at which the distance between the boats is changing when the first boat is 67 miles from the dock traveling at a speed of 36 miles per hour and the second boat is 89 miles from the dock traveling at a speed of 37 miles per hour.

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