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[" The radius of a circle is increasing ...

[" The radius of a circle is increasing at the rate of "5cm/minute" and the "],[" increase of its circumference? "],[" The length "x" of a rectangle is decreasing at the rate "x=8cm" and "y=6cm," find "],[" width "y" is increasing at the rate of "4cm/minute" .What are are of the rectangle."],[" the rates of change of "(a)" the perimeter,and (b) the area of the rectangle."]

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