1. Real Numbers
COURSE 3 CHAPTER 4
1. yes
2. no
3. yes
4. 4
5. 16
6. 48
7. composite; 2 • 32 • 5
8. composite; 24 • 33
9. prime
10. composite; 23 • 5 • 7
11. A rational number can be expressed as a ratio of two
integers, , where
b An irrational
number cannot be expressed in that way. Rational numbers are terminating or repeating decimals. Irrational numbers are non-terminating, non-repeating decimals.
12. rational
13. irrational
14. rational
15. irrational
16. rational
17. rational
18. <
19. <
20. > a b = /
4-A

2. Real Numbers
COURSE 3 CHAPTER 4 1 4
21. =
23. –3.375
26.
27.
28.
29.
in. mi
32. –
33. –
34.
35.
36.
37. –1
38. –2
39. –1
40. –
41. –3
42. –
43. 1
44. –1.2, –0.45, ,
45. –1, – , , 0.22
46. –1
47. – 1 2 7 20 14 15 3 5 1 3 25 36 35 36 16 25 7 12 5 11 99 45 1 6 3 13 44
202 2 3 2 15 1 3
471
1,000 4 9 3 20 94
333
4-A

3. Real Numbers
COURSE 3 CHAPTER 4 35 81
48.
49. –4
50. 12, –12
51. 16, –16
52. 10
53. 0
54. –1
55. 4
56. 16
57. 13
58. 36
59. no;
60. yes; 42 + (4.2)2 = (5.8)2
61. yes; = 262
62. no; = / = /
4-A