Algebra: A Combined Approach (4th Edition)

Published by Pearson
ISBN 10: 0321726391
ISBN 13: 978-0-32172-639-1

Chapter 2 - Section 2.5 - Formulas and Problem Solving - Exercise Set - Page 146: 9



Work Step by Step

$C=2\pi r;$ $C=15.7$ Substitute known values. (Let $\pi=3.14$) $15.7=2(3.14)r$ Solve for $r$ by dividing both sides of the equation by $2(3.14)$: $\dfrac{15.7}{2(3.14)}=\dfrac{2(3.14)r}{2(3.14)}$ $r=\dfrac{15.7}{2(3.14)}=2.5$
Update this answer!

You can help us out by revising, improving and updating this answer.

Update this answer

After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.