Basic College Mathematics (10th Edition)

Published by Pearson
ISBN 10: 0134467795
ISBN 13: 978-0-13446-779-5

Chapter 8 - Geometry - 8.6 Circles - 8.6 Exercises - Page 574: 20

Answer

The student used the radius instead of the diameter in the circumference equation, and the student used units of $mm^2$ instead of units of mm.

Work Step by Step

The equation for circumference is: $$C= \pi d $$ Thus, the correct method is: $$ C= \pi \times 14 \ mm \\ C=44 \ mm$$
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