Basic College Mathematics (9th Edition)

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

Chapter 10 - Statistics - Review Exercises - Page 752: 36

Answer

Percent of Total is 25%. Degrees of Circle is $90^\circ$.

Work Step by Step

Use ratios and cross multiplication to find the percent of total amount. $\frac{4480}{17920}=\frac{x}{100}\longrightarrow$ Cross multiply. $17920x=(4480)(100)\longrightarrow$ Divide both sides by 17920 to solve for x. $17920x\div17920=448000\div17920\longrightarrow$ Solve. $x=25$ A complete circle is $360^\circ%. Find 25% of 360 using the formula Part=Percent*Whole $p=0.25\times360=90$
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