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May 29, 2015

Homework Help: Calculus

Posted by Mulan on Tuesday, November 3, 2009 at 9:43pm.

1)Suppose Q = x^3 y^2 . If [dQ/dt] = −1 and [dx/dt] = 2, find [dy/dt] when
x = 4 and y = 5 .

[dy/dt] =______


2)Let A be the area of a circle with radius r. If [ dr / dt ] = 2, find [ dA / dt ] when r = 3

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