Page 216 - Basic College Mathematics with Early Integers

S E C T I O N 3.2 I FACTORS AND SIMPLEST FORM 193

69. The outer wall of the Pentagon is 24 inches thick.Ten 70. There are 35 students in a biology class. If 10 students
inches is concrete, 8 inches is brick, and 6 inches is made an A on the first test, what fraction of the
limestone.What fraction of the wall is concrete? students made an A?

Limestone (6 in.)
Brick (8 in.)
Concrete (10 in.)

71. As Internet usage grows in the United States, more 72. Katy Biagini just bought a brand-new 2011 Toyota
and more state governments are placing services Camry hybrid for $28,000. Her old car was traded in
online.Twenty-two out of the total fifty states have for $12,000.
Web sites that allow residents to file their state
a. How much of her purchase price was not covered
income tax online directly to the state.
by her trade-in?
a. How many states do not have this type of Web site? b. What fraction of the purchase price was not
b. What fraction of states do not have this type of covered by the trade-in?
Web site? (Source: Federation of Tax
Administrators)

73. As of this writing, a total of 320 individuals from the 74. Worldwide, Hallmark employs nearly 16,000 full-time
United States are/have been astronauts. Of these, 22 employees.About 4200 employees work at the
were born in Texas.What fraction of U.S. astronauts Hallmark headquarters in Kansas City, Missouri.
were born in Texas? (Source: NASA) What fraction of Hallmark employees work in Kansas
City? (Source: Hallmark Cards, Inc.)

Review

Multiply. See Section 1.6.

75. 91 76. 73 77. 387 78. 562 79. 72 80. 238
* 4 * 8 * 6 * 9 * 35 * 26

Concept Extensions

3
81. In your own words, define equivalent fractions. 82. Given a fraction, say , how many fractions are there
8
that are equivalent to it? Explain your answer.

Write each fraction in simplest form.

3975 9506
83. 84.
6625 12,222