Precalculus: Concepts Through Functions, A Unit Circle Approach to Trigonometry (3rd Edition)

Published by Pearson
ISBN 10: 0-32193-104-1
ISBN 13: 978-0-32193-104-7

Chapter 1 - Functions and Their Graphs - Section 1.1 Functions - 1.1 Assess Your Understanding - Page 55: 89

Answer

A = $\frac{x^{2}}{2}$

Work Step by Step

The length is twice the width so $2 \times Width$ = length Width = $\frac{length}{2}$ The length is given as $x$ so Width = $\frac{x}{2}$ Since the area $A$ of a rectangle is length times width, then A = ($\frac{x}{2}$)($x$) A = $\frac{x^{2}}{2}$
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