The length of a rectangle is increasing at a rate of 8 cm/s and its width is increasing at a rate of 5 cm/s. When the length is 10 cm and the width is 7 cm, how fast is the area of the rectangle increasing (in cm2/s)? Let l and w represent the length and width of the rectangle in cm, and let A represent the area of the rectangle in cm2. Writing an equation for A in terms of l and w gives the following result. A =

The length of a rectangle is increasing at a rate of 8 cm/s and its width is increasing at a rate of 5 cm/s. When the length is 10 cm and the width is 7 cm, how fast is the area of the rectangle increasing (in cm2/s)? Let l and w represent the length and width of the rectangle in cm, and let A represent the area of the rectangle in cm2. Writing an equation for A in terms of l and w gives the following result. A =

Algebra: Structure And Method, Book 1

(REV)00th Edition

ISBN:9780395977224

Author:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. Cole

Publisher:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. Cole

Chapter12: Quadratic Functions

Section12.8: Joint And Combined Variation

Problem 8P

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