Page 472 - Basic College Mathematics with Early Integers

S E C T ION 6 .1 I PERCENTS, DECIMALS, AND FRACTIONS 449

Review

Find the value of n. See Section 5.2.

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93. 3 n = 45 94. 2 n = 16 95. 6 n = 72 96. 5 n = 35
Concept Extensions

97. Write 0.7682 as a percent rounded to the nearest 98. Write 0.2371 as a percent rounded to the nearest
percent. percent.

99. Write 1.07835 as a percent rounded to the nearest 100. Write 1.25348 as a percent rounded to the nearest
tenth of a percent. tenth of a percent.

Solve. See the Concept Checks in this section.

101. Given the percent 52.8647%, round as indicated. 102. Given the percent 0.5269%, round as indicated.
a. Round to a tenth of a percent. a. Round to a tenth of a percent.
b. Round to a hundredth of a percent. b. Round to a hundredth of a percent.

103. Which of the following are correct? 104. Which of the following are correct?
a. 6.5% = 0.65 b. 7.8% = 0.078 a. 0.231 = 23.1% b. 5.12 = 0.0512%
c. 120% = 0.12 d. 0.35% = 0.0035 c. 3.2 = 320% d. 0.0175 = 0.175%

Recall that 1 = 100%. This means that 1 whole is 100%. Use this for Exercises 105 and 106. (Source: Some Body! by
Dr. Pete Rowen)

105. The four blood types are A, B, O, and AB. (Each blood 106. The top four components of bone are below. Find
type can also be further classified as Rh-positive or the missing percent.
Rh-negative depending upon whether your blood 1. Minerals–45%
contains protein or not.) Given the percent blood 2. Living tissue–30%
types for the United States below, calculate the 3. Water–20%
percent of U.S. population with AB blood type. 4. Other–?

45% 40% 11% ?%