Page 775 - Basic College Mathematics with Early Integers

ANSWERS TO SELECTED EXERCISES A7

Chapter 4 Decimals
Section 4.1
Vocabulary and Readiness Check 1. words; standard form 3. decimals 5. tenths; tens 7. tens 9. tenths
Exercise Set 4.1 1. six and fifty-two hundredths 3. sixteen and twenty-three hundredths 5. negative two hundred five thousandths 7. one hundred
sixty-seven and nine thousandths 9. three thousand and four hundredths 11. one hundred five and six tenths 13. two and forty-three hundredths
15. 17.
DATE DATE

PAY TO THE PAY TO THE
ORDER OF $ ORDER OF $
DOLLARS DOLLARS Answers to Selected Exercises

FOR FOR

3 27 2 2 29 1 401 601
19. 6.5 21. 9.08 23. -705.625 25. 0.0046 27. 29. 31. 33. 5 35. - 37. 7 39. 15 41.
10 100 5 5 500 125 500 2000
8 4 77
43. 0.8; or 45. seventy-seven thousandths; 47. 6 49. 6 51. 6 53. = 55. 6 57. 7 59. 6 61. 7 63. 0.6
10 5 1000
65. 98,210 67. -0.23 69. 0.594 71. 3.1 73. 3.142 75. $27 77. $0.20 79. 0.4 cm 81. 1.87 min 83. $68 85. 225 days
26,849,577
87. 5766 89. 35 91. b 93. a 95. answers may vary 97. 7.12 99. 101. answers may vary 103. answers may vary
100,000,000,000
105. 0.26499, 0.25786 107. 0.10299, 0.1037, 0.1038, 0.9 109. $2800 million
Section 4.2
Calculator Explorations 1. 328.742 3. 5.2414 5. 865.392
Vocabulary and Readiness Check 1. last 3. vertically 5. 0.5 7. 1.26 9. 8.9 11. 0.6
Exercise Set 4.2 1. 3.5 3. 6.83 5. 27.0578 7. 91.204 9. -8.57 11. 11.16 13. Exact: 465.56; Estimate: 230 15. Exact: 115.123;
+ 230
460
Estimate: 100 17. 56.432 19. 6.5 21. 15.3 23. 598.23 25. Exact: 1.83; Estimate: 6 - 4 = 2 27. 861.6 29. Exact: 876.6; Estimate: 1000
6 - 100
+ 9 900
115
31. 194.4 33. -6.32 35. -6.4 37. 3.1 39. 2.9988 41. 16.3 43. 3.1 45. -5.62 47. 776.89 49. -549.8 51. 861.6 53. 512.101
55. 0.088 57. -180.44 59. -1.1 61. 3.81 63. 3.39 65. 1.61 67. $7.52 69. $0.17 71. 28.56 m 73. 13.8– 75. 285.8 mph
77. 12.4 million (12,400,000) 79. $1595.09 million 81. 240.8 in. 83. 67.44 ft 85. 20.04 mph 87. Switzerland 89. 4.43 lb
4
91. Pounds of Chocolate 93. 46 95. 9 97. incorrect; 9.200 99. 6.08 in. 101. $1.20
Country per Person 8.630
+ 4.005
Switzerland 22.36
21.835
Austria 20.13
Ireland 19.47
Germany 18.04
Norway 17.93
103. 1 nickel, 1 dime, and 2 pennies; 3 nickels and 2 pennies; 1 dime and 7 pennies; 2 nickels and 7 pennies 105. answers may vary
107. answers may vary

Section 4.3
Vocabulary and Readiness Check 1. sum 3. circumference 5. right; zeros 7. 4 9. 4 11. 8
Exercise Set 4.3 1. 1.3 3. 0.6 5. -17.595 7. 55.008 9. Exact: 28.56; Estimate: 7 * 4 = 28 11. 0.1041 13. Exact: 8.23854; Estimate: 1
* 8
8
15. 11.2746 17. 65 19. 0.83 21. -7093 23. 70 25. 0.0983 27. 0.02523 29. 0.0492 31. 14,790 33. 1.29 35. -9.3762 37. 0.5623
39. 36.024 41. 1,500,000,000 43. 49,800,000 45. -0.6 47. 17.3 49. 10p cm L 31.4 cm 51. 18.2p yd L 57.148 yd 53. $715.20 55. 24.8 g
57. 10.8 sq in. 59. 250p ft L 785 ft 61. 135p m L 423.9 m 63. 64.9605 in. 65. a. 62.8 m and 125.6 m b. yes 67. $1214.50
69. 886.50 Canadian dollars 71. 1300.16 New Zealand dollars 73. 486 75. -9 77. 3.64 79. 3.56 81. -0.1105 83. 3,831,600 mi
85. answers may vary 87. answers may vary