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OpenStudy (anonymous):
at noon ship A is 40 miles due west of ship B. ship A is sailing west at 18mph and ship B is sailing north @ 23 mph. how fast is distance b/w the ships changing at 7pm
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OpenStudy (anonymous):
distance = 40 + 7(18+23) = 40 +287 = 327 miles
OpenStudy (anonymous):
distance changing by 41miles/hour
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