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July 24, 2014

Homework Help: Calculus

Posted by Johnny on Thursday, November 8, 2012 at 6:37am.

A 40-foot ladder is leaning against a house when its base starts to slide away. By the time the base is 32 feet from the house the base is moving at a rate of 4ft/sec.
a. How fast is the top of the ladder moving down the wall at that moment?
b. At what rate is the area of the triangle formed by the ladder, wall, and ground changing at the moment?
c. At what rate is the angle between the ladder and the ground changing at that moment?
I wasn't here the day the teacher taught us this...plz help me i have no idea where to start

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