138 Chapter 2 Fractions and Mixed Numbers: Multiplication and Division Using Multiplication in an Application Three-fifths of the students in the freshman class are female. Of these students, are over the age of 25.What fraction of the freshman class is female over the age of 25? 59 Example 8 Solution: Read and familiarize. Strategy/operation: We must find of of one whole freshman class.This implies multiplication. 5 9 5 9 3 5 35 5 1 93 3 1 51 1 3 One-third of the freshman class consists of female students over the age of 25. Skill Practice 17. In a certain police department, of the department is female. Of the female officers, were promoted within the last year. What fraction of the police department consists of females who were promoted within the last year? Answer 17. 2 21 Study Skills Exercise Write down the page number(s) for the Problem Recognition Exercises for this chapter. How do you think that the Problem Recognition Exercises can help you? Vocabulary and Key Concepts 1. Two numbers whose product is 1 are called of each other. Review Exercises 2. Write the prime factorization of 108. For Exercises 3–11, multiply and simplify to lowest terms. Write the answer as a fraction or whole number. 3. 4. 5. 3 a b 7 8 a b 5 6. 7. 8. a 10 9 5 9. 10. 11. 1 3 3 1 10 b a5 9 b a2 7 b a7 2 24 6 b 34 5 5 17 24 7 7 8 9 11 22 5 27 1 3 Section 2.5 Practice Exercises
miller_basic_college_math_3e_ch1_3
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