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Asked Mar 25, 2020
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21. Changing dimensions in a rectangle The length I of a rectangle
is decreasing at the rate of 2 cm/sec while the width w is increas-
ing at the rate of 2 cm/sec. When I = 12 cm and w = 5 cm, find
the rates of change of (a) the area, (b) the perimeter, and (c) the
lengths of the diagonals of the rectangle. Which of these quantities
are decreasing, and which are increasing?
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21. Changing dimensions in a rectangle The length I of a rectangle is decreasing at the rate of 2 cm/sec while the width w is increas- ing at the rate of 2 cm/sec. When I = 12 cm and w = 5 cm, find the rates of change of (a) the area, (b) the perimeter, and (c) the lengths of the diagonals of the rectangle. Which of these quantities are decreasing, and which are increasing?

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