SECTION 2.6 Ratio, Proportion, and Percent^137
45.Eight quarts of oil cost $14.00. How much do 5 qt of oil cost?
46.Four tires cost $398.00. How much do 7 tires cost?
47.If 9 pairs of jeans cost $121.50, find the cost of 5 pairs.
48.If 7 shirts cost $87.50, find the cost of 11 shirts.
49.If 6 gal of premium unleaded gasoline costs $19.56, how much would it cost to
completely fill a 15-gal tank?
50.If sales tax on a $16.00 DVD is $1.32, find the sales tax on a $120.00 DVD player.
51.The distance between Kansas City, Missouri, and Denver is 600 mi. On a certain wall
map, this is represented by a length of 2.4 ft. On the map, how many feet would there be
between Memphis and Philadelphia, two cities that are actually 1000 mi apart?
52.The distance between Singapore and Tokyo is 3300 mi. On a certain wall map, this
distance is represented by 11 in. The actual distance between Mexico City and Cairo is
7700 mi. How far apart are they on the same map?
53.A wall map of the United States has a distance of 8.5 in. between Memphis and Denver,
two cities that are actually 1040 mi apart. The actual distance between St. Louis and
Des Moines is 333 mi. How far apart are St. Louis and Des Moines on the map?
54.A wall map of the United States has a distance of 8.0 in. between New Orleans and
Chicago, two cities that are actually 912 mi apart. The actual distance between Milwau-
kee and Seattle is 1940 mi. How far apart are Milwaukee and Seattle on the map?
55.On a world globe, the distance between Capetown
and Bangkok, two cities that are actually 10,080 km
apart, is 12.4 in. The actual distance between
Moscow and Berlin is 1610 km. How far apart are
Moscow and Berlin on this globe?
56.On a world globe, the distance between Rio de
Janeiro and Hong Kong, two cities that are actually
17,615 km apart, is 21.5 in. The actual distance
between Paris and Stockholm is 1605 km. How far
apart are Paris and Stockholm on this globe?
57.According to the directions on a bottle of Armstrong®Concentrated Floor Cleaner, for
routine cleaning, cup of cleaner should be mixed with 1 gal of warm water. How much
cleaner should be mixed with gal of water?
58.The directions on the bottle mentioned in Exercise 57also specify that, for extra-strength
cleaning, cup of cleaner should be used for each gallon of water. For extra-strength
cleaning, how much cleaner should be mixed with gal of water?
59.The euro is the common currency used by most European countries, including Italy. On
August 15, 2009, the exchange rate between euros and U.S. dollars was 1 euro to $1.4294.
Ashley went to Rome and exchanged her U.S. currency for euros, receiving 300 euros.
How much in U.S. dollars did she exchange? (Source:www.xe.com/ucc)
60.If 8 U.S. dollars can be exchanged for 103.0 Mexican pesos, how many pesos can be
obtained for $65? (Round to the nearest tenth.)
61.Biologists tagged 500 fish in North Bay on Au-
gust 20. At a later date, they found 7 tagged fish
in a sample of 700. Estimate the total number
of fish in North Bay to the nearest hundred.
62.On June 13, researchers at West Okoboji Lake
tagged 840 fish. A few weeks later, a
sample of 1000 fish contained 18 that were
tagged. Approximate the fish population to
the nearest hundred.(^15 12)
1
2
(^10 12)
1
4