Page 770 - Basic College Mathematics with Early Integers

A2 ANSWERS TO SELECTED EXERCISES

77. 165 lb 79. 310 yd 81. 89 bridges 83. 11 light poles 85. 5 mi 87. 1760 yd 89. 20 91. 387 93. 79 95. 74° 97. 9278 99. 15,288
101. 679 103. undefined 105. 9 R 12 107. c 109. b 111. 120 113. increase; answers may vary 115. no; answers may vary 117. 12 ft
119. answers may vary 121. 5 R 1
Integrated Review 1. 148 2. 6555 3. 1620 4. 562 5. 79 6. undefined 7. 9 8. 1 9. 0 10. 0 11. 0 12. 3 13. 2433 14. 9826 15. 213 R 3
Answers to Selected Exercises
16. 79,317 17. 27 18. 9 19. 138 20. 276 21. 1099 R 2 22. 111 R 1 23. 663 R 6 24. 1076 R 60 25. 1024 26. 9899 27. 30,603
28. 47,500 29. 65 30. 456 31. 6 R 8 32. 53 33. 183 34. 231 35. 9740; 9700; 10,000 36. 1430; 1400; 1000 37. 20,800; 20,800; 21,000
38. 432,200; 432,200; 432,000 39. perimeter: 24 ft; area: 36 sq ft 40. perimeter: 42 in.; area: 98 sq in. 41. 28 mi 42. 26 m 43. 24 44. 124
45. Lake Pontchartrain Bridge; 2175 ft 46. 730 qt
Section 1.8

Exercise Set 1.8 1. 49 3. 237 5. 42 7. 600 9. a. 400 ft b. 9600 sq ft 11. $15,500 13. 168 hr 15. 3500 ft 17. 129 yr
19. 312 billion bricks 21. 719 towns 23. $27 25. 55 cal 27. 23 hot dogs 29. $30,956,764 31. 155,300 33. 3987 mi 35. 13 paychecks
37. $239 39. $1045 41. b will be cheaper by $3 43. Asia 45. 559 million 47. 109 million 49. 404 million 51. $14,754 53. 16,800 mg
55. a. 3750 sq ft b. 375 sq ft c. 3375 sq ft 57. $171 59. answers may vary

Section 1.9
Calculator Explorations 1. 4096 3. 3125 5. 2048 7. 2526 9. 4295 11. 8
Vocabulary and Readiness Check 1. base; exponent 3. addition 5. division
#
#
# #
Exercise Set 1.9 1. 4 3 3. 7 6 5. 12 3 7. 6 2 # 5 3 9. 9 8 2 11. 3 2 4 13. 3 2 4 5 5 15. 64 17. 125 19. 32 21. 1 23. 7 25. 128 27. 256
29. 256 31. 729 33. 144 35. 100 37. 20 39. 729 41. 192 43. 162 45. 3 47. 8 49. 12 51. 4 53. 21 55. 7 57. 5 59. 16 61. 46
63. 8 65. 64 67. 83 69. 2 71. 48 73. 4 75. undefined 77. 59 79. 52 81. 44 83. 12 85. 21 87. 24 89. 28 91. 3 93. 25 95. 23
97. 13 99. area: 49 sq m; perimeter: 28 m 101. area: 529 sq mi; perimeter: 92 mi 103. true 105. false 107. (2 + 3) · 6 - 2 109. 24 ÷ (3 · 2) + 2 · 5
111. 1260 ft 113. 6,384,814 115. answers may vary; (20 - 10) · 5 ÷ 25 + 3
Chapter 1 Vocabulary Check 1. whole numbers 2. perimeter 3. place value 4. exponent 5. area 6. square root 7. digits 8. average
9. divisor 10. dividend 11. quotient 12. factor 13. product 14. minuend 15. subtrahend 16. difference 17. addend 18. sum
Chapter 1 Review 1. tens 2. ten-millions 3. seven thousand, six hundred forty 4. forty-six million, two hundred thousand, one hundred twenty
5. 3000 + 100 + 50 + 8 6. 400,000,000 + 3,000,000 + 200,000 + 20,000 + 5000 7. 81,900 8. 6,304,000,000 9. 384,633,765 10. 11,805,500
11. Middle East 12. Asia 13. 63 14. 67 15. 48 16. 77 17. 956 18. 840 19. 7950 20. 7250 21. 4211 22. 1967 23. 1326 24. 886
25. 27,346 26. 39,300 27. 8032 mi 28. $197,699 29. 276 ft 30. 66 km 31. 14 32. 34 33. 65 34. 304 35. 3914 36. 7908 37. 17,897
38. 34,658 39. 184,338 40. 25,738 41. 397 pages 42. $25,626 43. May 44. August 45. $110 46. $240 47. 90 48. 50 49. 470 50. 500
51. 4800 52. 58,000 53. 50,000,000 54. 800,000 55. 65,000,000 56. 93,000 57. 7400 58. 4100 59. 2500 mi 60. 900,000 61. 1911 62. 1396
63. 1410 64. 2898 65. 800 66. 900 67. 3696 68. 1694 69. 0 70. 0 71. 16,994 72. 8954 73. 113,634 74. 44,763 75. 411,426
76. 636,314 77. 375,000 78. 108,000 79. 12,000 80. 35,000 81. 5,100,000 82. 7,600,000 83. 1150 84. 4920 85. 108 86. 112 87. 24 g
88. $122,240 89. 60 sq mi 90. 500 sq cm 91. 3 92. 4 93. 6 94. 7 95. 5 R 2 96. 4 R 2 97. undefined 98. 0 99. 1 100. 10 101. 0
102. undefined 103. 33 R 2 104. 19 R 7 105. 24 R 2 106. 35 R 15 107. 506 R 10 108. 907 R 40 109. 2793 R 140 110. 2012 R 60 111. 18 R 2
112. 21 R 2 113. 458 ft 114. 13 mi 115. 51 116. 59 117. 27 boxes 118. $192 119. 7 billion 120. 75¢ 121. $898 122. 23,150 sq ft
123. 49 124. 125 125. 45 126. 400 127. 13 128. 10 129. 15 130. 7 131. 12 132. 9 133. 42 134. 33 135. 9 136. 2 137. 1 138. 0
139. 6 140. 29 141. 40 142. 72 143. 5 144. 7 145. 49 sq m 146. 9 sq in. 147. 307 148. 682 149. 2169 150. 2516 151. 901
152. 1411 153. 458 R 8 154. 237 R 1 155. 70,848 156. 95,832 157. 1644 158. 8481 159. 740 160. 258,000 161. 2000 162. 40,000
163. thirty-six thousand, nine hundred eleven 164. one hundred fifty-four thousand, eight hundred sixty-three 165. 70,943 166. 43,401 167. 64
168. 125 169. 12 170. 10 171. 12 172. 1 173. 2 174. 6 175. 4 176. 24 177. 24 178. 14 179. $513,000 180. $4,488,000
181. 53 full boxes with 18 left over 182. $86
Chapter 1 Test 1. eighty-two thousand, four hundred twenty-six 2. 402,550 3. 141 4. 113 5. 14,880 6. 766 R 42 7. 200 8. 10 9. 0
10. undefined 11. 33 12. 21 13. 8 14. 36 15. 5,698,000 16. 11,200,000 17. 52,000 18. 13,700 19. 1600 20. 92 21. 122 22. 1605
23. 7 R 2 24. $17 25. $126 26. 360 cal 27. $7905 28. 20 cm; 25 sq cm 29. 60 yd; 200 sq yd

Chapter 2 Integers and Introduction to Variables
Section 2.1
Vocabulary and Readiness Check 1. expression 3. expression; variables
Exercise Set 2.1 1. 28; 14; 147; 3 3. 152; 152; 0; undefined 5. 57; 55; 56; 56 7. 9 9. 26 11. 6 13. 3 15. 117 17. 94 19. 5 21. 626 23. 20
25. 4 27. 4 29. 0 31. 33 33. 121 35. 121 37. 100 39. 60 41. 4 43. 16, 64, 144, 256 45. x + 5 47. x + 8 49. 20 - x 51. 512x
x 6
53. x , 2 or 55. 5x + 117 + x2 57. 5x 59. 11 - x 61. x - 5 63. 6 , x or 65. 50 - 8x 67. hundreds 69. thousands
2 x
71. incorrect; 2(0) + 3(7) = 0 + 21 = 21 73. correct 75. 274,657 77. 777 79. 5x 81. As t gets larger, 16t 2 gets larger.
Section 2.2
Vocabulary and Readiness Check 1. integers 3. inequality symbols 5. is less than; is greater than 7. absolute value Copyright 2012 Pearson Education, Inc.
Exercise Set 2.2 1. -1445 3. +14,433 5. +118 7. -11,730 9. -8 11. -135; -157; Sara 13. -13 15.
0 1 2 3 4 5 6 7 8
17. 19. 21. 23. 7 25. 6 27. 7
5 4 3 2 1 0 1 2 3 4 0 1 2 3 4 5 6 7 8 8 7 6 5 4 3 2 1 0 1