Basic College Mathematics (9th Edition)

Published by Pearson
ISBN 10: 0321825535
ISBN 13: 978-0-32182-553-7

Chapter 8 - Geometry - 8.6 Circles - 8.6 Exercises: 32

Answer

Diameter of the Circle: 20 mi Area of the Circle: 314 mi$^{2}$

Work Step by Step

a) We know the circumference of the circle. We simple divide the circumference by $\pi$ to get the diameter. Circumference of a Circle: $C$ = $\pi$$d$ Therefore: 62.8 mi = 3.14$d$ $d$ = 20 mi b) Area of a Circle: $A$ = $\pi$$d$$^{2}$ / 4 $A$ = (3.14)(20 mi)$^{2}$ / 4 $A$ = 314 mi$^{2}$
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.