Answers_pt2 - 0001-08 B-PRECALC4e 02 SE Ans 11:35 AM Page 33 Answers to Selected Exercises 18 f1x2 2x4 2 19 1 and 20 1q 3 2 13 q 2 2 3 21 1q 1 2 11 q 2

Answers_pt2 - 0001-08 B-PRECALC4e 02 SE Ans 11:35 AM Page...

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18. 19. 20. 21. 22. domain: 23. domain: 24. domain: 25. domain: all real numbers 26. a. b. ;As the number of satellite radio players increases, the average cost approaches $10. 27. 28. 29. 45 foot-candles Cumulative Review Exercises (Chapters P–2) 1. domain: ; range: 2. and 1, both of multiplicity 2 3. 0 4. 3 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. CHAPTER 3 Section 3.1 Check Point Exercises 1. approximately $160; overestimates by $11 2. 3. 4. 5. 6. approximately 4446 7. a. $14,859.47 b. $14,918.25 y x 5 5 f ( x ) 2 x g ( x ) 2 x 1 y 1 g f y x 5 5 f ( x ) 3 x g ( x ) 3 x 1 g f y x 5 5 x f ( x ) 1 3 y x 5 5 f ( x ) 3 x 4 x 2 h 1 1 f g 2 1 x 2 32 x 2 20 x 2 y 3 5 x x 2 y 2 2 x 4 y 4 0 y 5 5 x f g y 5 5 x f ( x ) x 1 x 2 y x 5 5 f ( x ) x 2 ( x 3) y x 10 10 f ( x ) x 2 2 x 8 y 10 5 x f ( x ) x 3 4 x 2 x 4 a 5 3 , q b ´ 1 q , 1 2 1 4, q 2 ´ 1 q , 1 2 5 3, 1, 2 6 e 1 3 , 2 3 f e 5 1 13 6 , 5 1 13 6 f 5 2, 1 6 y 9 3 x g ( x ) f ( x 2) 1 x S 2 ; x S 2 1 3 0, q 2 1 2, 2 2 3 10 3 4 1 q , 3 2 ´ 3 10, q 2 1 3, 4 2 y 10 C 1 x 2 300,000 10 x x y x 5 5 f ( x ) 4 x 2 x 2 3 y x 5 5 f ( x ) x 1 x 2 2 x 3 y x 5 5 f ( x ) x 2 9 x 2 y x 5 10 f ( x ) x x 2 16 5 x x 3, x 1 6 5 x x 2 6 5 x x 4, x 4 6 y 5 x 1 x 1 f ( x ) 2 7 y 2 7 x 1 ( x 3) 2 f ( x ) y 2 2 x f ( x ) 3 x 3 4 x 2 x 2 1 q , 1 2 ´ 1 1, q 2 1 q , 3 2 ´ 1 3, q 2 1 and 2 3 f 1 x 2 2 x 4 2 Answers to Selected Exercises AA33
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AA34 Answers to Selected Exercises Exercise Set 3.1 1. 10.556 3. 11.665 5. 0.125 7. 9.974 9. 0.387 11. 13. 15. 17. 19. 21. 23. 25. 27. 29. 31. 33. asymptote: asymptote: asymptote: asymptote: asymptote: domain: domain: domain: domain: domain: range: range: range: range: range: 35. 37. 39. 41. 43. asymptote: asymptote: asymptote: asymptote: asymptote: domain: domain: domain: domain: domain: range: range: range: range: range: 45. 47. 49. 51. 53. a. $13,116.51 b. $13,140.67 c. $13,157.04 d. $13,165.31 55. 7% compounded monthly asymptote: asymptote of : asymptote of : domain: asymptote of : asymptote of : asymptote of : range: asymptote of : 57. 59. 61. 63. 65. a. 574 million b. 1148 million c. 2295 million d. 4590 million e. It appears to double. 67. $832,744 69. 3.249009585; 3.317278183; 3.321880096; 3.321995226; 3.321997068; ;The closer the exponent is to , the closer the value is to . 71. a. approximately 8.9 million words b. approximately 10.4 million words c. linear model 73. a. 100% b. c. d. 20% 75. the function 81. a. ; 83. does not make sense 85. does not make sense 87. false 89. false b. 91. is (d); is (c); is (a); is (b). 5% interest compounded quarterly y a 1 5 b x y a 1 3 b x y 5 x y 3 x A 10,000 a 1 0.045 12 b 12 t A 10,000 a 1 0.05 4 b 4 t g 30.8% 68.5% 2 1 3 1 3 2 1 3 3.321997085 y e x y 4 x y x y 2 x x 2 y y x f ( x ) 2 x g ( x ) 2 x 1 0, 1 2 y 1 g 1 1, q 2 y 0 f y 0 g y 0 g 1 q , q 2 y 0 f y 0 f y 1 y 5 5 x g ( x ) 1 1 2 x 1 f ( x ) 1 2 x y 1 g f y x 5 5 f ( x ) 3 x g ( x ) · 3 x g f 1 3 y x 5 5 f ( x ) 3 x g ( x ) 3 x f g y x 7 5 h ( x ) e 2 x 1 y 1 1 0, q 2 1 0, q 2 1 2, q 2 1 2, q 2 1 0, q 2 1 q , q 2 1 q , q 2 1 q , q 2 1 q , q 2 1 q , q 2 y 0 y 0 y 2 y 2 y 0 y x 7 5 g ( x ) 2 e x y x 5 5 h ( x ) e x y x 7 5 h ( x ) e x 1 2 y 2 y x 7 5 g ( x ) e x 2 y 2 y x 5 5 g ( x ) e x 1 1 0, q 2 1 q , 0 2 1 1, q 2 1 1, q 2 1 0, q 2 1 q , q 2 1 q , q 2 1 q , q 2 1 q , q 2 1 q , q 2 y 0 y 0 y 1 y 1 y 0 y x 5 5 f ( x ) 2 x g ( x ) 2 2 x g f y x 5 5 f ( x ) 2 x g ( x ) 2 x g f y x 5 5 f ( x ) 2 x h ( x ) 2 x 1 1 y 1 h f y x 5 5 f ( x ) 2 x g ( x ) 2 x 1 y 1 g f y x 5 5 f ( x ) 2 x g ( x ) 2 x 1 g f h 1 x 2 3 x 1 F 1 x 2 3 x H 1 x 2 3 x y x 5 5 f ( x ) (0.6) x y x 5 5 h ( x ) 1 2 x y x 5 5 g ( x ) 3 2 x y x 5 5 f ( x ) 4 x 0 20 8000 24,000
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Answers to Selected Exercises AA35 93. a. c. 1 b. 1 1 1 1 1 94. We don’t know how to solve for .
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