Algebra 1

Published by Prentice Hall
ISBN 10: 0133500403
ISBN 13: 978-0-13350-040-0

Chapter 2 - Solving Equations - Chapter Test - Page 157: 13


a. The diameter is approximately 31.8 b. The area is approximately 793.8

Work Step by Step

a. The circumference formula is $C=\pi d$. Plugging in the given circumference $100=\pi d$. Then solving for $d$ by dividing by $\pi$ giving the expression $100/\pi$ for $d$. b. The area formula is $A=\pi r^{2}$. Plugging in the radius $A=\pi (15.9^{2})=793.8$
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