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 an equation relating the area of the circular plate, A, and the radius, r.

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 an equation relating the area of the circular plate, A, and the radius, r.

Elementary Algebra

17th Edition

ISBN:9780998625713

Author:Lynn Marecek, MaryAnne Anthony-Smith

Publisher:Lynn Marecek, MaryAnne Anthony-Smith

Chapter8: Rational Expressions And Equations

Section8.9: Use Direct And Inverse Variation

Problem 8.178TI: The area of a circle varies directly as the square of the radius. A circular pizza with a radius of...

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Question

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 an equation relating the area of the circular plate, A, and the radius, r.

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