Page 772 - Basic College Mathematics with Early Integers

A4 ANSWERS TO SELECTED EXERCISES

124. -16 125. -15 126. -19 127. 48 128. -21 129. 21 130. -5 131. -$9 132. 6°C 133. 13,118 ft 134. -27°C 135. 2
136. 4 137. 3 138. 37 139. -5 140. -25 141. -20 142. 17
Chapter 2 Test 1. 3 2. -6 3. -100 4. 4 5. -30 6. 12 7. 65 8. 5 9. 12 10. -6 11. 50 12. -2 13. -11 14. -46 15. -117
16. 3456 17. 28 18. -213 19. -1 20. -2 21. 2 22. -5 23. -32 24. -12 25. -3 26. 5 27. -1 28. -54 29. 1 30. -17
Answers to Selected Exercises
31. 88 ft below sea level 32. 45 or $45 33. 31,642 or 31,642 ft 34. 3820 ft below sea level 35. -4 36. a. 17x b. 20 - 2x
Cumulative Review 1. hundred-thousands; Sec. 1.2, Ex. 1 2. hundreds; Sec. 1.2 3. thousands; Sec. 1.2, Ex. 2 4. thousands; Sec. 1.2 5. ten-millions;
Sec. 1.2, Ex. 3 6. hundred-thousands; Sec. 1.2 7. a. 6 b. 7 c. 7; Sec. 2.2, Ex. 3 8. a. 7 b. 6 c. 7 ; Sec. 2.2 9. 39; Sec. 1.3, Ex. 3
10. 39;Sec.1.3 11. 7321;Sec.1.4,Ex.2 12. 3013;Sec.1.4 13. 36,184 mi;Sec.1.4,Ex.5 14. $525;Sec.1.4 15. 570;Sec.1.5,Ex.1 16. 600;Sec.1.5
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17. 1800; Sec. 1.5, Ex. 5 18. 5000; Sec. 1.5 19. a. 3 4 + 3 5 b. 10 6 + 10 8 c. 2 7 + 2 3; Sec. 1.6, Ex. 2 20. a. 5 2 + 5 12 b. 9 3 + 9 6
c. 4 # 8 + 4 # 1 ; Sec. 1.6 21. 78,875; Sec. 1.6, Ex. 5 22. 31,096; Sec. 1.6 23. a. 6 b. 8 c. 7; Sec. 1.7, Ex. 1 24. a. 7 b. 8 c. 12; Sec. 1.7
25. 741; Sec. 1.7, Ex. 4 26. 456; Sec. 1.7 27. 12 cards; 10 cards left over; Sec. 1.7, Ex. 11 28. $9; Sec. 1.7 29. 81; Sec. 1.9, Ex. 5 30. 125; Sec. 1.9
31. 6; Sec. 1.9, Ex. 6 32. 4; Sec. 1.9 33. 180; Sec. 1.9, Ex. 8 34. 56; Sec. 1.9 35. 2; Sec. 1.9, Ex. 16 36. 5; Sec. 1.9 37. 15; Sec. 2.1, Ex. 1
38. 14; Sec. 2.1 39. a. 2 b. 5 c. 0; Sec. 2.2, Ex. 4 40. a. 4 b. 7; Sec. 2.2 41. 21; Sec. 2.3, Ex. 7 42. 5; Sec. 2.3 43. 22; Sec. 2.4, Ex. 12
44. 5; Sec. 2.4 45. -21; Sec. 2.5, Ex. 1 46. -10 ; Sec. 2.5 47. 0; Sec. 2.5, Ex. 3 48. -54 ; Sec. 2.5 49. -16; Sec. 2.6, Ex. 8 50. -27 ; Sec. 2.6
Chapter 3 Fractions
Section 3.1
Vocabulary and Readiness Check 1. fraction; denominator; numerator 3. improper; proper; mixed number
Exercise Set 3.1 1. numerator: 1; denominator: 2; proper 3. numerator: 10; denominator: 3; improper 5. numerator: 15; denominator: 15; improper
1 11 3 23 5 7 3 4 4 1 11 1 1 5
7. 9. a. b. 2 11. a. b. 3 13. 15. 17. 19. a. b. 1 21. a. b. 5 23. 25. 27.
3 4 4 6 6 12 7 9 3 3 2 2 6 8
42 89
29. 31. 33. of the students 35. a. 89 students b. of the students
131 131
7 15 11 10 33
37. of the U.S. presidents 39. of the tropical storms 41. of the month 43. of the class 45. a. of the states b. 17 states
44 28 31 31 50
17 21 29
c. of the states 47. a. of the marbles b. 29 marbles c. of the marbles 49. 1
50 50 50 4
0 1
51. 4 53. 8 55. 7 57. 1 59. -5
7 5 3
0 1 0 1 2 0 1 2 3
-11 11 13 13
3
61. 0 63. 1 65. undefined 67. 3 69. 9 71. 125 73. 7 5 75. 2 # 3 77. ; 79. ; - 81. answers may vary
2 -2 -15 15
576 1700
83. 85. 7 87. of the stores 89. of the affiliates
3167 2250
Section 3.2
4 20 8 2
Calculator Explorations 1. 3. 5. 7.
7 27 15 9
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Vocabulary and Readiness Check 1. prime factorization 3. prime 5. equivalent 7. yes, yes, yes 9. 3 5 11. 2 3 13. 2 2
1 2 7 2
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2
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Exercise Set 3.2 1. 2 2 # 5 3. 2 4 # 3 5. 3 2 # 5 7. 2 3 4 9. 2 5 11 11. 5 17 13. 2 4 # # 15. 2 2 # # 23 17. 19. 21. 23.
3 5
4 21 8 3
7 7 3 27 5 5 3 3 5 3 11 7
25. 27. - 29. 31. 33. 35. - 37. 39. 41. 43. 45. - 47. 49. 14 51. equivalent 53. not equivalent
10 9 5 64 8 8 2 4 14 14 17 8
1 1 8 17 5
55. equivalent 57. equivalent 59. not equivalent 61. not equivalent 63. of a shift 65. mi 67. a. b. 34 states c. 69. of the wall
4 2 25 25 12
14 11 3 9 1
5
5 7
3
71. a. 28 b. 73. of U.S. astronauts 75. 364 77. 2322 79. 2520 81. answers may vary 83. 85. 87. 89. 2 2 # # #
25 160 5 25 25
1 2
91. answers may vary 93. no; answers may vary 95. 97. answers may vary 99. 101. answers may vary 103. 786, 222, 900, 1470
10 25
105. 6; answers may vary
Section 3.3
a # c 2 # # 2 2 2 a # d 2 6 9
2 2
Vocabulary and Readiness Check 1. 3. ; # # 5. 7. 9. 11.
b d 7 7 7 7 b c 15 35 8
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7 5 1 6 5 1 18 1 1 4 4 4 1 16
Exercise Set 3.3 1. 3. - 5. 7. 9. 11. 13. 0 15. 17. 19. 21. 23. - 25. 27. - 29. -
12 28 15 35 28 70 55 56 125 9 27 5 6 9 Copyright 2012 Pearson Education, Inc.
1 1 35 8 10 1 3 9 77 8 1 1 12
31. - 33. 35. 37. 39. undefined 41. 0 43. 45. - 47. 49. 51. 53. 55. - 57. a. b.
6 100 36 45 27 4 4 16 2 3 36 3 25
36 44 3 1
59. a. - b. - 61. 50 63. 20 65. 128 67. 49 million 69. 868 mi 71. in. 73. $1838 75. 50 libraries 77. sq ft 79. 3840 mi
55 45 16 14
2
81. 2400 mi 83. 201 85. 196 87. answers may vary 89. 91. 5 93. 38,175,000 people 95. 8505
5