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The length x of a rectangle is decreasin...

The length x of a rectangle is decreasing at the rate of 5 cm/minute and the width y is increasing at the rate of 4 cm/minute. When x = 8 cm and y = 6 cm, find the rates of change of (a) the [erimeter, and (b) the area of the rectangle.

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The correct Answer is:
(a) `-2` cm/min. (b) `2 cm^(2)`/min.
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