128 Chapter 2 Fractions and Mixed Numbers: Multiplication and Division 4. Applications of Multiplying Fractions Example 9 2 25 306,000,000 2 25 306,000,000 1 612,000,000 25 24,480,000 2 25 Multiply the numerators. Multiply the denominators. 2 25 Skill Practice 13. Find the population of Tennessee if it is approximately of the U.S. population. Assume that the U.S. population is approximately 306,000,000. TIP: To take a fractional portion of a quantity, multiply the quantity by the fraction. Study Skills Exercise Write down the page number(s) for the Chapter Summary for this chapter. _______ Describe one way in which you can use the summary found at the end of each chapter. Vocabulary and Key Concepts 1. a. The values and so on are called powers of _________. In simplified form these equal , and so on. b. Given a triangle with base b and height h, the area of the triangle is given by _____. Review Exercises 2. a. Convert the fraction to a mixed number. 18 b. Convert the mixed number to an improper fraction. For Exercises 3–6, identify the numerator and the denominator. Then simplify the fraction to lowest terms. 3. 4. 5. 6. 2100 7000 25 15 32 36 10 14 4 17 5 A 1 10, 1 100, 1 1000 1 1 1021, 1 1 1022, 1 1 1023, Multiplying Fractions in an Application The population of Texas comprises roughly of the population of the United States. If the U.S. population is approximately 306,000,000, approximate the population of Texas. Solution: We must find of the U.S. population. This translates to Divide by 25. The population of Texas is approximately 24,480,000. Answer 13. 6,120,000 1 50 Section 2.4 Practice Exercises
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