Chapter 9, Problem 18RP

Population Growth The double-bar graph illustrates the predicted population explosion by the year 2050. Use this graph to answer exercises 13–-20.

When we work with large numbers such as millions and billions, we can simplify the calculations if we write the words million or billion in place of the zeros. For example, to subtract $6,000,000-2,000,000$, we can write $6million-2million=4million$. Use this method as you solve exercises 17–-20.

How much greater is the population predicted to be in the United States in 2050 than in 2006?