social workers. 69.It would take 6 hours for the hamburger
to go from 71°F to 29°F. 70.It cost $32 to rent the trailer.
71.She runs 9 miles and she walks 6 miles. 72.The
attendance on the first day was 2,200 people. The attendance
on the second day was 4,400 people. 73.The width of the
parking lot is 25 feet and the length is 100 feet. 74.The
lunar module was 54 feet tall. 75. a.base n, exponent 12
b.base 2x, exponent 6 c.base r, exponent 4
d.base y7, exponent 3 76. a.m^5 b. 3 x^4 c.a^2 b^4
d.(pq)^3 77. a.x^4 b. 2 x^2 c.x^3 d.does not simplify- a.keep the base 3, don’t multiply the bases. b.multiply
the exponents, don’t add them. 79. 712 80.m^2 n^3 81.y^21 - 81 x^4 83. 636 84.b^12 85. 256 s^10 86.4.41x^4 y^2
87.(9)^15 88.a^23 89. 8 x^15 90.m^10 n^18 91. 72 a^17
92.x^200 93. 256 m^13 94. 108 t^22 - a.Variables b.distributive c.like d.combined
e.coefficient f.substitute g.expressions h.equation
i.solve j.check 2. a.(bc) d b(cd)
b. and 3.s 10 the length of the trout
(in inches) 4. a.r 2 b. 3 xy c. d. 2 w 7
5.three-fourths of t 6. a.h 5 the length of the upper
base (in feet) b. 2 h 3 the length of the lower base (in
feet) 7. a.factor b.term 8. a.4 terms b.1, 8,1, 6
9. 3 10. 36 11. a. 36 s b. 120 t c. 12 x d. 72 m - a. 25 x 5 b. 42 6 x c. 6 y 4 d.0.6a0.9b
2.1 e.m 4 f. 18 r 9 13. 12 m^2 and 2m^2 - a. 12 y b. 40 a c. 21 b^2 d. 11 z 13 15. 3 y 3
16.It is not a solution. 17. 4 18.3.1 19. 11 20. 81
- 24 23. 2 24. 25.6.2 26. 1 27. 16
28. 15 29.The sound intensity of a jet engine is
110 decibels. 30.At this time, the college has 2,080
parking spaces. 31.The string section is made up of
54 musicians. 32.The developer donated 44 acres of land
to the city. 33.The smaller number is 23 and the larger
number is 40. 34.The width of the frame is 24 inches and
the length is 48 inches. 35. a.base: 6, exponent: 5
b.base:b, exponent: 4 36. a. 2 x^2 b.x^4 c.does not
simplify d.x^3 37. a.h^6 b.m^20 c.b^8 d.x^18
e.a^6 b^10 f. 144 a^18 b^2 g. 216 x^15 h.t^15 38.Keep the
common base 5, and add the exponents. Do not multiply
the common bases to get 25.
- 24 23. 2 24. 25.6.2 26. 1 27. 16
- a.7,535,700 b.7,540,000 2.One billion, seven
hundred twenty-six million, three hundred fifty-seven
thousand, sixty-eight; 1,000,000,000 700,000,000
20,000,000 6,000,000 300,000 50,000 7,000 60 8
3.9,314 4.3,322 5.245,870 6. 875 7. a.260 ft
b.4,000 ft^2 8.$170 9. a.1, 2, 4, 5, 10, 20 b. - a. 42 b. 7 11. 56 12. 2
− 6 − 5 − 4 − 3 − 2 − 1012345 6
22 5Chapters 1–8 Cumulative Review (page 708)1
51
2c
31 t t t 1 tChapter 8 Test (page 706)- a. 11 b. 11 c.false 15. a. 5 b. 38
c. 240 d. 8 16.125°F 17. 5 18. 200
- 12 25.
- a.He will have read of the book.
b.He has of the book left to read. 28. a.1 hundredth
b. 7 c. 3 d.7 thousandths e.304.82 29.658.04007
30.182.894 31.2,262 32.3.16 33.453.1 34.13.60- 270 90 27 9 3 36.67.5 mm 37. a.0.76
b.0.0 38. 7 39. 40.$93.75 41.18.9 42. hr
43.7.5 g 44.about 16 lb 45. 25%, 0. , , 0.042
46.52% 47. 65 48.$37.20, $210.80 49. 820 50.$556- a.the 18–49 age group b.328 people 52.mean: 6,
median: 5, mode: 10 53. 52 54. a.x 4 b. 2 w 50 - a. 15 x b. 28 x^2 56. a. 6 x 8 b. 15 x 10 y 20
- a. 5 x b. 12 a^2 c.xy d. 29 x 36
58.It is not a solution. 59. 5 60. 16 61. 4 62. 18
63.She must observe 21 more shifts.
64.The length is 84 feet and the width is 21 feet. - a.base: 8, exponent: 9 b.base:a, exponent: 3
- a.p^9 b.t^15 c.x^5 y^7 d. 81 a^8 e. 108 p^12 f.(2.6)^16
1.point, line, plane 3.midpoint 5.angle 7.protractor
9.right 11.180° 13.Adjacent 15.congruent
17.90° 19. a.one b.line- a. b.S c.
- a. b. c.
d.- a. b.
c. d.27.congruent 29. a.false b.false c.false d.true
31.true 33.false 35.line 37.ray 39.angle
41.degree 43.congruent- a. b. c.
A C
B
JKT130°
50°70°20°(^12)
l 1
l 2
A
B
C
D
SR RST, TSR, S, 1
!
, ST
!
Study Set Section 9.1 (page 720)
21
500
3
1
4
,
1
1
3
9
7
15
1
6
5
6
13
3
4
1
3
42
19
22
17
18
2
5
1
7
45
54
3
8
A-50 Appendix V Answers to Selected Exercises