CHAPTER 10 Review Exercises 651 Section 10.4 Installment Payment Formula m p r n r n 1 1 n t ( ) = ⎛ ⎝ ⎞ ⎠ − ⎛ + ⎝ ⎞ ⎠ − ⋅ Actuarial Method = ⋅ ⋅ + u n P V V 100 Example 3, page 618 Example 6, pages 620 – 621 Section 10.5 Mortgage Principal and Interest Payment Formula m p r n r n 1 1 n t ( ) = ⎛ ⎝ ⎞ ⎠ − ⎛ + ⎝ ⎞ ⎠ − ⋅ Example 3, pages 634 Section 10.6 Ordinary Annuity Formula A p r n r n 1 1 n t ( ) = ⎛ + ⎝ ⎞ ⎠ − ⎡ ⎣ ⎢ ⎤ ⎦ ⎥ ⎛ ⎝ ⎞ ⎠ ⋅ Sinking Fund Payment Formula p A r n r n 1 1 n t ( ) = ⎛ ⎝ ⎞ ⎠ ⎛ + ⎝ ⎞ ⎠ − ⋅ Discussion, pages 642– 643, Example 1, page 644 Discussion, page 645, Example 2, page 646 10.1 In Exercises 1– 6, change the number to a percent. Round your answer to the nearest tenth of a percent. 1. 7 20 35% 2. 7 12 58.3% 3. 5 8 62.5% 4. 0.041 4.1% 5. 0.0098 0.98% 1.0% ≈ 6. 3.141 314.1% In Exercises 7–12, change the percent to a decimal number. 7. 8% 0.08 8. 22.9% 0.229 9. 123% 1.23 10. 1 4 % 0.0025 11. 5 6 % 0.0083 12. 0.00045% 0.0000045 Review Exercises CHAPTER 10 13. Salary Increase Charlotte had a salary of $41,500 during the first year of a new job and a salary of $42,745 during the second year. Determine the percent increase in Charlotte’s salary from the first year to the second year. 3.0% 14. Manatee Weight Loss Jasmine, a manatee rescued at Mote Marine Laboratory, weighed 9400 pounds on May 17. One year later, on the day Jasmine was released back into the ocean, she weighed 8225 pounds. Determine the percent decrease in Jasmine’s weight. 12.5% In Exercises 15–17, solve for the unknown quantity. 15. What percent of 80 is 16? 20.0% 16. Forty-four is 55% of what number? 80
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