College Algebra 7th Edition

Published by Brooks Cole
ISBN 10: 1305115546
ISBN 13: 978-1-30511-554-5

Chapter 1, Equations and Graphs - Section 1.7 - Solving Inequalities - 1.7 Exercises - Page 149: 80

Answer

$10\leq C\leq35$

Work Step by Step

The Fahrenheit to Celsius formula is: $C=5/9(F-32)$ Reversing the formula gives the Celsius to Fahrenheit conversion relation: $F=9/5C+32$ We use this formula to convert the inequality to Celsius: $50\le F\le 95$ $50\leq 9/5C+32\leq95\\18\leq 9/5C\leq63\\10\leq C\leq35$
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