Precalculus: Mathematics for Calculus, 7th Edition

Published by Brooks Cole
ISBN 10: 1305071751
ISBN 13: 978-1-30507-175-9

Chapter 2 - Review - Modeling with Functions - Problems - Page 240: 5

Answer

$A = 10x - x^2$

Work Step by Step

Area of a rectangle is $lw$ (length x width) The perimeter of the rectangle is 20 ft. So if the width of the rectangle is x, then the length is 10-x Thus $A=lw$ $A = x(10-x)$ $A = 10x - x^2$
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