February 26, 2017

Homework Help: calculus

Posted by jason on Monday, March 16, 2009 at 2:32am.

26. A train is heading due west from St. Louis. At noon, a
plane flying horizontally due north at a fixed altitude of
4 miles passes directly over the train. When the train has
traveled another mile, it is going 80 mph, and the plane
has traveled another 5 miles and is going 500 mph. At
that moment, how fast is the distance between the train
and the plane increasing?

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