Page 43 - Basic College Mathematics with Early Integers

20 C HAPTE R 1 I THE WHOLE NUMBERS

To solve a word problem that involves addition, we first use the facts given to
write an addition statement. Then we write the corresponding solution of the real-
life problem. It is sometimes helpful to write the statement in words (brief phrases)
and then translate to numbers.

PRACTICE 7
Georgia produces 70 million Example 7 Finding a Stadium Capacity
pounds of freestone peaches per The Darrell K Royal Memorial Stadium, located in
year.The second largest U.S. Austin, Texas, is the largest football stadium in the Big
producer of peaches, South 12 Conference. Before 2009, it could seat 94,113 fans.
Carolina, produces 50 million Recently, the capacity of the stadium was increased by Austin
more freestone peaches than 4525 permanent bleacher seats. Find the new capacity
Georgia. How much does South of the home of the University of Texas Longhorns
Carolina produce? (Source: for the 2009 season. (Source: University of Texas
farms.com) Athletics)

South Carolina
(2nd in Solution: The key phrase here is “was increased by,” which suggests that we add.
production) To find the new capacity of the stadium, we add the increase, 4525, to the old capacity.

In Words Translate to Numbers
Old capacity ¡ 94,113
+ increase ¡ + 4,525
New capacity ¡ 98,638
California
(1st in The number of seats in the stadium for the 2009 season was 98,638.
production) Georgia—the Work Practice 7
Peach State
(3rd in
production) Graphs can be used to visualize data. The graph shown next is called a bar
graph. For this bar graph, the height of each bar is labeled above the bar. To check
this height, follow the top of each bar to the vertical line to the left. For example, the
first bar is labeled 146. Follow the top of that bar to the left until the vertical line is
reached, not quite halfway between 140 and 160, or 146.

Example 8 Reading a Bar Graph
PRACTICE 8
In the following graph, each bar represents a country and the height of each bar
Use the graph in Example 8 to
represents the number of endangered species identified in that country.
answer the following:
a. Which country shown has Number of Endangered Species
the fewest endangered 160
species? 146
Number of Endangered Species 80 83 73 72 64
b. Find the total number of 140
endangered species for 120
Brazil, India, and Mexico. 100 89

60
40
20

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Indonesia India China Brazil Mexico Australia
Answer
Country
7. 120 million lb
Source: The Top 10 of Everything, Russell Ash
8. a. Australia b. 234