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 - 5.2 The Integers; Order of Operations - Exercise Set 5.2 - Page 271: 129

Answer

The difference is of $1138\text{ billion dollars}$

Work Step by Step

Consider the given bar graph. From the image above, the number corresponding to $2007$year are, Money collected was$2568$ billion dollars Money spent was$2729$ billion dollars So, the total difference in amount is, $\begin{align} & \text{Diff }=\text{money collected - money spent} \\ & =2568-2729 \\ & =-161 \end{align}$ Thus, the difference is of$-161\,\,\text{billion}\,\text{dollars}$. Since it is negative, the budget is a deficit. From the image above, the number corresponding to $2011$year are, Money collected was $2304$ billion dollars Money spent was$3603$ billion dollars So, the total difference in amount is, $\begin{align} & \text{Diff }=\text{money collected - money spent} \\ & =2304-3603 \\ & =-1299 \end{align}$ Thus, the difference is of$-\text{1299}\,\,\text{billion}\,\text{dollars}$. Since it is negative, the budget is a deficit. So, the total difference in amount is, $\begin{align} & \text{Diff }=~-161-\left( -1299 \right) \\ & =-161+1299 \\ & =1138 \end{align}$ Thus, the difference is of$\text{1138}\,\,\text{billion}\,\text{dollars}$.
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