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May 27, 2015

Homework Help: Calculus

Posted by Bill on Monday, December 12, 2011 at 11:15pm.

At 4 PM ship A is 40 miles due South Ship B. Ship A is sailing due South at a rate of 20 knots while ship B is sailing due East at a rate of 25 knots. Find the rate of change of the distance between the ships at 3 PM and at 5 PM. At what time were the ships closest together ?

[ Hint let t = 0 correspond to 4 PM , so t = 1 corresponds to 3 PM and t = 1 corresponds to 5 PM
Find dL/dt at these times where L is the distance between the ships at time t ]

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