Help me solve example 9

EXAMPLE 9 Pictograph of Cigarette Smokers Refer to Figure 2-13 and see that the larger cigarette is about twice as long, twice as tall, and twice as deep as the smaller cigarette, so the volume of the larger cigarette is about eight times the volume of the smaller cigarette. (The data are from the Centers for Disease Control and Prevention.) The larger cigarette appears to be eight times as large as the smaller cigarette, but the actual percentages show that the 37% smoking rate in 1970 is about twice that of the 18% rate in 2013. 1970: 37% of U.S. adults smoked. 2013: 18% of U.S. adults smoked. FIGURE 2-13 Smoking by U.S. Adults YOUR TURN Do Exercise 19 "Cost of Giving Birth."