31) As the zoom lens in a camera moves in and out, the size of the rectangular image changes. Assume that the current image is 4 cm x 2 cm. Find the rate at which the area of the image is changing (dA/df) if the length of the image is changing at 0.8 cm/s and the width of the image is changing at 0.3 cm/s.

31) As the zoom lens in a camera moves in and out, the size of the rectangular image changes. Assume that the current image is 4 cm x 2 cm. Find the rate at which the area of the image is changing (dA/df) if the length of the image is changing at 0.8 cm/s and the width of the image is changing at 0.3 cm/s.

College Algebra

10th Edition

ISBN:9781337282291

Author:Ron Larson

Publisher:Ron Larson

Chapter1: Equations, Inequalities, And Mathematical Modeling

Section1.1: Graphs Of Equations

Problem 9ECP

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