Solve the problem. See Example 1.In 2009, there were 87 licensed drivers for every 100 U.S...
Solve the problem. See Example 1.
In 2009, there were 87 licensed drivers for every 100 U.S. residents of driving age (16 and over). How many of the 241 million residents of driving age were licensed drivers? (Source: Bureau of Transportation Statistics.)
Complete the proportion, solve it, and give the answer.
EXAMPLE 1 Applying Proportions
After Lee Ann Spahr pumped 5.0 gal of gasoline, the display showing the price read $23.20. When she finished pumping the gasoline, the price display read $67.28. How many gallons did she pump? To solve this problem, set up a proportion, with prices in the numerators and gallons in the denominators. Let x = the number of gallons pumped.
She pumped a total of 14.5 gal. Check this answer. Notice that the way the proportion was set up uses the fact that the unit price is the same, no matter how many gallons are purchased.
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