Page 779 - Basic College Mathematics with Early Integers

ANSWERS TO SELECTED EXERCISES A11

15 3 in. 43 47 76
Chapter 5 Test 1. 2. 3. 4. 5. 6. 81.25 km/hr 7. 28 students/teacher 8. 9 inches/sec 9. 8-oz size 10. true
2 10 days 50 78 31
4 7 1 3 1
11. 5 12. 4 13. -8 14. 15. 49 ft 16. 3 hr 17. 53 g 18. 23 ft 4 in. 19. 10 qt 20. 1.875 lb 21. 0.04 g 22. 36 mm
11 8 2 4 3
23. 830 ml 24. 3 lb 13 oz 25. 2 gal 3 qt 26. 2.256 km or 2256 m 27. 5.6 m 28. 4 gal 3 qt 29. 91.4 m 30. 16 ft 6 in. 31. 493 ft 6 in.
32. 150.368 m 33. 3.1 mi
Cumulative Review 1. a. 3 b. 15 c. 0 d. 70; Sec. 1.4, Ex. 1 2. a. 0 b. 20 c. 0 d. 20 ; Sec. 1.6 3. 249,000; Sec. 1.5, Ex. 3
4. 249,000; Sec. 1.5 5. a. 200 b. 1230; Sec. 1.6, Ex. 3 6. 373 R 24; Sec. 1.7 7. $6171; Sec. 1.8, Ex. 3 8. 16,591 feet; Sec. 1.8
3 1 3 2
9. 2 4 # 5 ; Sec. 3.2, Ex. 2 10. 8; Sec. 1.9 11. ; Sec. 3.2, Ex. 4 12. 243; Sec. 1.9 13. - ; Sec. 3.3, Ex. 5 14. 15 ; Sec. 3.7 15. ; Sec. 3.3, Ex. 6
5 8 8 5
5 5 19 4 49
16. ; Sec. 3.3 17. ; Sec. 3.4, Ex. 1 18. ; Sec. 3.4 19. 2; Sec. 3.4, Ex. 3 20. ; Sec. 3.4 21. 14; Sec. 3.4, Ex. 12 22. ; Sec. 3.5
54 7 30 5 50
15 8 47 1
23. ; Sec. 3.4, Ex. 16 24. yes; Sec. 3.2 25. - ; Sec. 3.5, Ex. 5 26. 7 ; Sec. 3.7 27. hr; Sec. 3.5, Ex. 11 28. 27; Sec. 1.9 Answers to Selected Exercises
20 33 72 6
17 16
29. 7 ; Sec. 3.7, Ex. 9 30. ; Sec. 3.6 31. 6 ; Sec. 3.5, Ex. 7 32. 14,000,000; Sec. 1.6 33. negative five and eighty-two hundredths; Sec. 4.1, Ex. 1b
24 27
34. 0.075; Sec. 4.1 35. 736.2; Sec. 4.1, Ex. 15 36. 736.236; Sec. 4.1 37. 25.454; Sec. 4.2, Ex. 1 38. 681.24; Sec. 4.2 39. 0.8496; Sec. 4.3, Ex. 2
79 4 9
40. 0.375; Sec. 4.5 41. -0.052 ; Sec. 4.4, Ex. 3 42. ; Sec. 4.5 43. -3.7 ; Sec. 4.5, Ex. 12 44. 3; Sec. 5.2 45. , , 0.456; Sec. 4.5, Ex. 10
10 9 20
3 1 26 1
46. 140 m/sec; Sec. 5.1 47. ; Sec. 5.1, Ex. 2 48. ; Sec. 5.1 49. ; Sec. 5.1, Ex. 3 50. ; Sec. 5.1
2 3 31 10
Chapter 6 Percent
Section 6.1
Vocabulary and Readiness Check 1. Percent 3. percent 5. 0.01 7. 13% 9. 87% 11. 1%
Exercise Set 6.1 1. 96% 3. a. 75% b. 25% 5. football; 37% 7. 50% 9. 0.41 11. 0.06 13. 1.00 or 1 15. 0.613 17. 0.028 19. 0.006
3 1 9 7 3 1 31 179
21. 3.00 or 3 23. 0.3258 25. 27. 29. 31. or 1 33. 35. 37. 39. 0.3% 41. 22% 43. 530% 45. 5.6%
25 25 200 4 4 16 300 800
1 7
47. 33.28% 49. 300% 51. 70% 53. 70% 55. 40% 57. 34% 59. 37 % 61. 77 % 63. 250% 65. 190% 67. 63.64% 69. 26.67%
2 9
7 1 7 2 47 1 3 4
71. 0.35, ; 20%, 0.2; 50%, ; 0.7, ; 37.5%, 0.375 73. 0.4, ; 23.5%, ; 80%, 0.8; 0.333 , ;3 87.5%, 0.875; 0.075, 75. 2, 2; 280%, 2 ;
20 2 10 5 200 3 40 5
1 131 23 1 71 79
7.05, 7 ; 454%, 4.54 77. 0.262; 79. 0.23; 81. 25% 83. 0.38 85. 0.202 87. 0.005; 89. 0.142; 91. 0.079;
20 500 100 200 500 1000
93. n = 15 95. n = 12 97. 77% 99. 107.8% 101. a. 52.9% b. 52.86% 103. b, d 105. 4% 107. network systems and data
communication analysts 109. 0.35 111. 75% 113. 80% 115. greater 117. answers may vary 119. 0.266; 26.6% 121. 1.155; 115.5%
Section 6.2
Vocabulary and Readiness Check 1. is 3. amount; base; percent 5. greater 7. percent: 42%; base: 50; amount: 21 9. percent: 125%;
base: 86; amount: 107.5
#
#
#
#
#
#
Exercise Set 6.2 1. 18% 81 = n 3. 20% n = 105 5. 0.6 = 40% n 7. n 80 = 3.8 9. n = 9% 43 11. n 250 = 150 13. 3.5 15. 28.7
17. 10 19. 600 21. 110% 23. 34% 25. 1 27. 645 29. 500 31. 5.16% 33. 25.2 35. 35% 37. 35 39. 0.624 41. 0.5% 43. 145
7 17 n 8 14
45. 63% 47. 4% 49. n = 30 51. n = 3 53. = 55. = 57. c 59. b 61. Twenty percent of some number is eighteen
11 12 20 9 n
and six tenths. 63. b 65. c 67. c 69. a 71. a 73. answers may vary 75. 686.625 77. 12,285
Section 6.3
Vocabulary and Readiness Check 1. amount; base; percent 3. amount 5. amount: 12.6; base: 42; percent: 30 7. amount: 102; base: 510; percent: 20
a 98 a 4 14.3 26 84 35 70 p 8.2 p
Exercise Set 6.3 1. = 3. = 5. = 7. = 9. = 11. = 13. 26 15. 18.9 17. 600 19. 10
45 100 150 100 b 100 b 100 400 100 82 100
21. 120% 23. 28% 25. 37 27. 1.68 29. 1000 31. 210% 33. 55.18 33. 45% 37. 75 39. 0.864 41. 0.5% 43. 140 45. 9.6 47. 113%
7 2
49. 51. 3 53. 0.7 55. 2.19 57. answers may vary 59. no; a = 16 61. yes 63. answers may vary 65. 12,011.2 67. 7270.6
8 15
Integrated Review 1. 12% 2. 68% 3. 12.5% 4. 250% 5. 520% 6. 800% 7. 6% 8. 44% 9. 750% 10. 325% 11. 3% 12. 5%
3 1 21 51
13. 0.65 14. 0.31 15. 0.08 16. 0.07 17. 1.42 18. 4 19. 0.029 20. 0.066 21. 0.03; 22. 0.05; 23. 0.0525; 24. 0.1275;
100 20 400 400
19 9 37 1
25. 0.38; 26. 0.45; 27. 0.123; 28. 0.167; 29. 8.4 30. 100 31. 250 32. 120% 33. 28% 34. 76 35. 11 36. 130% 37. 86%
50 20 300 6
38. 37.8 39. 150 40. 62
Section 6.4
Exercise Set 6.4 1. 1600 bolts 3. 8.8 lb 5. 14% 7. 232 films 9. 17% 11. 496 chairs; 5704 chairs 13. 83,820 physician assistants
15. 636.864 thousand or approximately 637 thousand 17. 30% 19. 50% 21. 12.5% 23. 29.2% 25. $175,000 27. 31.2 hr