Thinking Mathematically (6th Edition)

Published by Pearson
ISBN 10: 0321867327
ISBN 13: 978-0-32186-732-2

Chapter 5 - Number Theory and the Real Number System - 5.4 The Irrational Numbers - Exercise Set 5.4 - Page 297: 80

Answer

(a) The median height of girls who are $50$ months old is approximately $41\text{ inches}$. From the graph, check for the value of $y\text{-axis}$ for the corresponding value on $x\text{-axis}$as $50$. As shown by the line, it is $41\text{ inches}$. (b) Consider the provided formula, $h=3.1\sqrt{x}+19$ Substitute $50$ for $x$ and find $h$. That is., $h=3.1\sqrt{50}+19$ Now, use a calculator to find the value. So, the value of $h$is $40.9\text{ inches}$, which is close to $41$ as calculated above.
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