Page 498 - Basic College Mathematics with Early Integers

S E C T I O N 6.4 I APPLICATIONS OF PERCENT 475

7. In a recent year, approximately 32% of films were 8. In a recent year, approximately 8% of films were
rated R. If 725 films were rated, how many were rated PG. If 725 films were rated, how many were
rated R? (Source: Motion Picture Association of rated PG? (Source: Motion Picture Association of
America) America)

9. Approximately 160,650 of America’s 945,000 10. Of the 58,200 veterinarians in private practice in the
restaurants are pizza restaurants. Determine the United States, approximately 27,354 are female.
percent of restaurants in America that are pizza Determine the percent of female veterinarians in
restaurants. (Source: Pizza Marketplace, National private practice in the United States. (Source: American
Restaurant Association) Veterinary Medical Association)

11. A furniture company currently produces 6200 chairs 12. The enrollment at a local college decreased by 5%
per month. If production decreases by 8%, find the over last year’s enrollment of 7640. Find the decrease
decrease and the new number of chairs produced in enrollment and the current enrollment.
each month.

13. From 2006 to 2016, the number of people employed 14. From 2001 to 2007, the number of households
as physician assistants in the United States is owning dogs increased by 13.5%.The number of
expected to increase by 27%.The number of people households owning dogs in 2001 was 37,900,000. Find
employed as physician assistants in 2006 was 66,000. the number of households owning dogs in 2007.
Find the predicted number of physician assistants in (Source: American Veterinary Medical Association)
2016. (Source: Bureau of Labor Statistics)

Let’s look at the populations of two states, North Dakota and Louisiana.Their locations are shown on the partial U.S.
map below. Round each answer to the nearest thousand. (Source: U.S. Dept. of Commerce)

15. In 2000, the population of North Dakota was North Dakota
approximately 642 thousand. If the population
decreased by 0.8% between 2000 and 2009, find the
population of North Dakota in 2009.

16. In 2000, the population in Louisiana was approximately
4470 thousand. If the population increased about 0.5% Louisiana
between 2000 and 2009, find the population of
Louisiana in 2009.

A popular extreme sport is snowboarding. Ski trails are marked with difficulty levels of easy , intermediate , difficult ,
expert , and other variations. Use this information for Exercises 17 and 18. Round each percent to the nearest whole.
See Example 2.

17. At Keystone ski area in Colorado, approximately 41 18. At Telluride ski area in Colorado, about 28 of the 115
of the 135 total ski runs are rated intermediate. total ski runs are rated easy.What percent of the runs
What percent of the runs are intermediate? are easy?