The length \( x \) of a rectangle is decreasing at the rate of \( 5 \mathrm{~cm} / \mathrm{minut...

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The length \( x \) of a rectangle is decreasing at the rate of \( 5 \mathrm{~cm} / \mathrm{minute} \) and the width \( y \) is increasing at the rate of \( 4 \mathrm{~cm} / \) minute. When \( x=8 \mathrm{~cm} \) and \( y=6 \mathrm{~cm} \), find the rate of change of the area of the rectangle.
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