Page 352 - Basic College Mathematics with Early Integers

S E C T I O N 4.5 I FRACTIONS, DECIMALS, AND ORDER OF OPERATIONS 329

35. The United States contains the greatest fraction of 36. Hungary has the lowest fraction of people using the
71 7
people who use the Internet, with about people Internet, with only people using it. (Source: UCLA
97 40
using it. (Source: UCLA Center for Communication Center for Communication Policy)
Policy)

37. When first launched, the Hubble Space Telescope’s 38. The two mirrors currently in use in the Hubble Space
1 Telescope were ground so that they do not deviate
primary mirror was out of shape on the edges by
50 1
of a human hair.This very small defect made it from a perfect curve by more than of an inch.
800,000
difficult to focus faint objects being viewed. Because
Do not round this number.
the HST was in low Earth orbit, it was serviced by a
shuttle and the defect was corrected.

Objective Insert 6, 7, or = to form a true statement. See Examples 8 and 9.
41. 0.215 43 29

39. 0.562 0.569 40. 0.983 0.988 42. 0.725
200 40
45. 0.6 5 46. 0.1 2
43. -0.0932 -0.0923 44. -0.00563 -0.00536
6 17

51 6 4 5
47. 0.564 48. 0.583 49. 0.14 50. 0.557
91 11 7 9

18 22 456 89
51. 1.38 52. 0.372 53. 7.123 54. 12.713
13 59 64 7

Write the numbers in order from smallest to largest. See Example 10.

55. 0.34, 0.35, 0.32 56. 0.47, 0.42, 0.40 57. 0.49, 0.491, 0.498 58. 0.72, 0.727, 0.728

42 67 5 5
59. 5.23, , 5.34 60. 7.56, , 7.562 61. , 0.612, 0.649 62. , 0.821, 0.849
8 9 8 6

Objective Simplify each expression. See Examples 11 through 14.

1 + 0.8 2
2
63. (0.3) + 0.5 64. (-2.5)(3) - 4.7 65. 66. (-0.05) + 3.13
-0.6
0.222 - 2.13
2
67. (-2.3) (0.3 + 0.7) 68. (8.2)(100) - (8.2)(10) 69. (5.6 - 2.3)(2.4 + 0.4) 70.
12
(4.5) 2 7 + 0.74
2
71. 72. 0.9(5.6 - 6.5) 73. 74. (1.5) + 0.5
100 -6

Find the value of each expression. Give the result as a decimal. See Examples 11 through 14.

1 3 1 3
75. - 2(7.8) 76. - (9.6)(5) 77. (-9.6 - 5.2) 78. (4.7 - 5.9)
5 4 4 8