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When a circular plate of metal is heated in an oven, its radius increases at a rate of 0.02 cm/min. At what rate is

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When a circular plate of metal is heated in an oven, its radius increases at a rate of 0.02 cm/min. At what rate is the plate's area increasing when the radius is 50 cm? Write the equation that relates the rate of change in area to the rate of change in radius. dA dt dr (Type an expression using r as the variable.) dt

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