Answer
$100 \leq r \leq 170$
Work Step by Step
r = 220 - 20 = 200 (To find r put A = 20 in the equation)
Take 50% and 85% or r which is 100 and 170 respectively.
Hence, formulate the inequality using the given description
$100 \leq r \leq 170$
Algebra and Trigonometry 10th Edition
by Larson, Ron
Published by
Cengage Learning
ISBN 10:
9781337271172
ISBN 13:
978-1-33727-117-2
Chapter 1 - 1.7 - Linear Inequalities in One Variable - 1.7 Exercises - Page 138: 89
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