Answer
$3.99 \leq x \leq 4.01$
Work Step by Step
$-0.01 \leq x-4 \leq 0.01$ is the meaning of the absolute value. Remember, absolute value cannot be negative, BUT if $x\leq0$ $|x|=-x$.
Solving gives $3.99 \leq x \leq 4.01$
College Algebra (10th Edition)
by Sullivan, Michael
Published by
Pearson
ISBN 10:
0321979478
ISBN 13:
978-0-32197-947-6
Chapter 10 - Cumulative Review - Page 710: 4
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