Page 780 - Basic College Mathematics with Early Integers

A12 ANSWERS TO SELECTED EXERCISES

29. $867.87; $20,153.87 31. 35 ft 33. increase: $3918; tuition in 2009–2010: $8679 35. increase: 41,667 associate degrees; 2017–2018:
772,667 associate degrees 37. 30; 60% 39. 52; 80% 41. 2; 25% 43. 120; 75% 45. 44% 47. 1.3% 49. 158.0% 51. 30.8%
53. 5.6% 55. 19.7% 57. 29.0% 59. 38.8% 61. 4.56 63. 11.18 65. 58.54 67. The increased number is double the original number.
30
69. percent increase = = 20% 71. False; the percents are different.
150
Answers to Selected Exercises
Section 6.5
Vocabulary and Readiness Check 1. sales tax 3. commission 5. sale price
Exercise Set 6.5 1. $7.50 3. $858.93 5. 7% 7. a. $120 b. $130.20 9. $117; $1917 11. $485 13. 6% 15. $16.10; $246.10
17. $53,176.04 19. 14% 21. $4888.50 23. $185,500 25. $8.90; $80.10 27. $98.25; $98.25 29. $143.50; $266.50 31. $3255; $18,445
33. $45; $255 35. $27.45; $332.45 37. $3.08; $59.08 39. $7074 41. 8% 43. 1200 45. 132 47. 16 49. d 51. $4.00; $6.00; $8.00
53. $7.20; $10.80; $14.40 55. a discount of 60% is better; answers may vary 57. $26,838.45
Section 6.6
Calculator Explorations 1. 1.56051 3. 8.06231 5. $634.49
Vocabulary and Readiness Check 1. simple 3. Compound 5. Total amount
Exercise Set 6.6 1. $32 3. $73.60 5. $750 7. $33.75 9. $700 11. $101,562.50; $264,062.50 13. $5562.50 15. $14,280 17. $46,815.37
19. $2327.14 21. $58,163.65 23. 2915.75 25. $2938.66 27. $2971.89 29. $260.31 31. $637.26 33. 32 yd 35. 35 m
37. answers may vary 39. answers may vary
amount 1
Chapter 6 Vocabulary Check 1. of 2. is 3. Percent 4. Compound interest 5. 6. 100% 7. 0.01 8. 9. base; amount
base 100
10. Percent of decrease 11. Percent of increase 12. Sales tax 13. Total price 14. Commission 15. Amount of discount 16. Sale price
Chapter 6 Review 1. 37% 2. 77% 3. 0.83 4. 0.75 5. 0.735 6. 0.015 7. 1.25 8. 1.45 9. 0.005 10. 0.007 11. 2.00 or 2 12. 4.00 or 4
13. 0.2625 14. 0.8534 15. 260% 16. 102% 17. 35% 18. 5.5% 19. 72.5% 20. 25.2% 21. 7.6% 22. 8.5% 23. 71% 24. 65%
1 1 1 17 51 1 1 1 1
25. 400% 26. 900% 27. 28. 29. 30. 31. 32. 33. 34. 1 35. 20% 36. 70% 37. 83 % 38. 60%
100 10 4 200 500 6 3 10 3
2
39. 125% 40. 166 % 41. 6.25% 42. 62.5% 43. 100,000 44. 8000 45. 23% 46. 114.5 47. 3000 48. 150% 49. 418 50. 300
3
51. 64.8 52. 180% 53. 110% 54. 165 55. 66% 56. 16% 57. 20.9% 58. 106.25% 59. $206,400 60. $13.23 61. $263.75 62. $1.15
63. $5000 64. $300.38 65. discount: $900; sale price: $2100 66. discount: $9; sale price: $81 67. $160 68. $325 69. $30,104.61 70. $17,506.54
47 8 7 1 5
71. $80.61 72. $32,830.10 73. 0.038 74. 0.245 75. 0.009 76. 54% 77. 9520% 78. 30% 79. 80. 81. 82. 37 % 83. 15 %
100 125 125 2 13
84. 120% 85. 268.75 86. 110% 87. 708.48 88. 134% 89. 300% 90. 38.4 91. 560 92. 325% 93. 26% 94. $6786.50 95. $617.70
96. $3.45 97. 12.5% 98. $1491 99. $17,951.01 100. $11,687.50
6 1 77 1 5
Chapter 6 Test 1. 0.85 2. 5 3. 0.008 4. 5.6% 5. 610% 6. 39% 7. or 1 8. 9. 10. 55% 11. 37.5% 12. 155 % 13. 33.6
5 5 200 500 9
14. 1250 15. 75% 16. 38.4 lb 17. $56,750 18. $358.43 19. 5% 20. discount: $18; sale price: $102 21. $395 22. 1% 23. $647.50
24. $2005.63 25. $427
2 1
Cumulative Review 1. 206 cases; 12 cans; yes; Sec. 1.8, Ex. 2 2. 31,084; Sec. 1.6 3. a. 4 b. 1 c. 14; Sec. 3.6, Ex. 9
7 15
19 101 43 10 23 4
4. a. b. c. ; Sec. 3.6 5. - ; Sec. 3.2, Ex. 6 6. 44; Sec. 1.7 7. ; Sec. 3.3, Ex. 4 8. 76,500; Sec. 1.5 9. ; Sec. 3.3, Ex. 11
7 10 8 27 56 5
15 3 4 1 2
10. or 3 ; Sec. 3.1 11. in. ; Sec. 3.4, Ex. 10 12. 50; Sec. 1.9 13. 60; Sec. 3.4, Ex. 13 14. ; Sec. 3.4 15. ; Sec. 3.5, Ex. 1 16. 340; Sec. 3.3
4 4 5 3 3
5 3 27 1 3
17. 3 ; Sec. 3.7, Ex. 13 18. 33; Sec. 1.9 19. ; Sec. 3.7, Ex. 6 20. 33 ; Sec. 3.7 21. ; Sec. 3.3, Ex. 8b 22. 6 ; Sec. 3.7
14 20 40 16 8
23. -0.625 ; Sec. 4.5, Ex. 2 24. 0.09; Sec. 4.5 25. 3.14; Sec. 4.5, Ex. 4 26. 0.0048; Sec. 4.5 27. $41,568; Sec. 4.1, Ex. 18 28. 27.94; Sec. 4.2
29. 829.6561; Sec. 4.2, Ex. 2 30. 1248.3; Sec. 4.3 31. 18.408; Sec. 4.3, Ex. 1 32. 76,300; Sec. 4.3 33. 0.7861; Sec. 4.4, Ex. 8 34. 1.276; Sec. 4.4
35. -0.012 ; Sec. 4.4, Ex. 9 36. 50.65; Sec. 4.4 37. 7.236; Sec. 4.5, Ex. 11 38. 0.191; Sec. 4.5 39. 0.25; Sec. 4.5, Ex. 1 40. 0.5 L 0.556 ; Sec. 4.5
1
41. no; Sec. 5.2, Ex. 3 42. 0.052 per tortilla; 0.058 per tortilla; 18 tortilla pkg is better buy; Sec. 5.1 43. 17 mi ; Sec. 5.3, Ex. 1
2
1
#
44. a. 0.07 b. 2 c. 0.005; Sec. 6.1 45. n = 25% 0.008 ; Sec. 6.2, Ex. 3 46. 37.5% or 37 % ; Sec. 6.1
2
Chapter 7 Statistics and Probability
Section 7.1
Vocabulary and Readiness Check 1. bar 3. line Copyright 2012 Pearson Education, Inc.
Exercise Set 7.1 1. Kansas 3. 3.5 million or 3,500,000 acres 5. Montana 7. Montana and South Dakota 9. 78,000 11. 2006 13. 30,000
1
15. 86,000 wildfires/year 17. September 19. 75 21. 23. Tokyo, Japan; about 33.8 million or 33,800,000
38