Basic Mathematics for College Students

110. SOAP Ivory soap claims to be pure. Write
     this percent as a decimal.


111. LOGOS In the illustration,
     what part of the company’s
     logo is shaded red? Express
     your answer as a percent
     (exact), a fraction, and a
     decimal (using an overbar).


112. THE HUMAN SPINE
     The human spine consists
     of a group of bones
     (vertebrae) as shown.
     a. What fraction of the
     vertebrae are lumbar?
     b. What percent of the
     vertebrae are lumbar?
     (Round to the nearest
     one percent.)
     c. What percent of the
     vertebrae are cervical?
     (Round to the nearest
     one percent.)


113. BOXING Oscar De La Hoya won 39 out of 45
     professional fights.
     a. What fraction of his fights did he win?
     b. What percent of his fights did he win? Give the
     exact answer and an approximation to the
     nearest tenth of one percent.


114. MAJOR LEAGUE BASEBALL In 2008, the
     Milwaukee Brewers won 90 games and lost 72
     during the regular season.
     a. What was the total number of regular season
     games that the Brewers played in 2008?
     b. What percent of the games played did the
     Brewers win in 2008? Give the exact answer and
     an approximation to the nearest tenth of one
     percent.


115. ECONOMIC FORECASTS One economic
     indicator of the national economy is the number of
     orders placed by manufacturers. One month, the
     number of orders rose one-fourth of 1 percent.
     a. Write this using a % symbol.
     b. Express it as a fraction.
     c. Express it as a decimal.

99 10044 %

512 Chapter 6 Percent

Recycling Industries Inc.

7 Cervical

vertebrae

12 Thoracic

vertebrae

5 Lumbar

vertebrae

1 Sacral

vertebra

4 Coccygeal

vertebrae

116. TAXES In August of 2008, Springfield, Missouri,
     voters approved a one-eighth of one percentsales tax
     to fund transportation projects in the city.
     a. Write the percent as a decimal.
     b. Write the percent as a fraction.


117. BIRTHDAYS If the day of your birthday represents
     of a year, what percent of the year is it? Round
     to the nearest hundredth of a percent.


118. POPULATION As a fraction, each resident of the
     United States represents approximately of
     the U.S. population. Express this as a percent.
     Round to one nonzero digit.

WRITING

119. If you were writing advertising, which form do you
     think would attract more customers: “25% off”
     or “ off”? Explain your reasoning.


120. Many coaches ask their players to give a 110%
     effort during practices and games. What do you
     think this means? Is it possible?


121. Explain how an amusement park could have an
     attendance that is 103% of capacity.


122. WON-LOST RECORDS In sports, when a team
     wins as many games as it loses, it is said to be playing
     “500 ball.” Suppose in its first 40 games, a team wins
     20 games and loses 20 games. Use the concepts in
     this section to explain why such a record could be
     called “500 ball.”

REVIEW

123. The width of a rectangle is 6.5 centimeters and its
     length is 10.5 centimeters.
     a. Find its perimeter.
     b. Find its area.


124. The length of a side of a square is 9.8 meters.
     a. Find its perimeter.
     b. Find its area.

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