Answer
$r=3$
Work Step by Step
We know that if the radius of the circle is $r$, then the circumference is $2r\pi$, which here is $6\pi$, thus $r=3$.
College Algebra (10th Edition)
by Sullivan, Michael
Published by
Pearson
ISBN 10:
0321979478
ISBN 13:
978-0-32197-947-6
Chapter 2 - Section 2.4 - Circles - 2.4 Assess Your Understanding - Page 188: 60
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