How fast is the distance between the ships changing
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1. (1 pt) At noon, ship A is 180 km west of ship B. Ship A is sailing south at 20 km/h and ship B is sailing north at 40 km/h. How fast is the distance between the ships changing at 4:00 PM?
_________km/h
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Let B be at the origin. Then A is 180 km west of the origin.
Vertical distance covered by A in t hours = 20 * t= 20t km
Vertical distance covered ...
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