Pre-Algebra Chapter 9

Practice and Apply
Homework Help
For
Exercises
See
Examples
12–23 1
24–33 2
34–46 3
47, 48 4
Extra Practice
See page 745.
Find each square root, if possible.
12. 16 13. 36 14. 1 15. 25
16. 4
20. 256
17. 49 18. 100 19. 196
21. 324 22. 0.81 23. 2.25
Use a calculator to find each square root to the nearest tenth.
24. 15 25. 56 26. 43 27. 86
28. 180
29. 250
30. 0.75
32. Find the negative square root of 1000 to the nearest tenth.
33. If x 5000 , what is the value of x to the nearest tenth?
31. 3.05
34. The number 54 lies between which two consecutive whole numbers?
Do not use a calculator.
Estimate each square root to the nearest whole number. Do not use a
calculator.
35. 79 36. 95 37. 54 38. 125
39. 200 40. 396 41. 280 42. 490
43. 5.25 44. 17.3 45. 38.75 46. 140.57
ROLLER COASTERS For Exercises
47–49, use the table shown and
refer to Example 4 on page 438.
47. On a clear day, how far can a
person see from the top hill of
the Vortex?
48. How far can a person see on a
clear day from the top hill of
the Titan?
Online Research Data Update How far can you see from the top of
the tallest roller coaster in the United States? Visit www.pre-alg.com/
data_update to learn more.
Complete Exercises 49 and 50 without the help of a calculator.
49. Which is greater, 65 or 9? Explain your reasoning.
50. Which is less, 11 or 120 ? Explain your reasoning.
51. GEOMETRY The area of each square is given. Estimate the length of a
side of each square to the nearest tenth.
a. b. c.
109 in 2 Source: Roller Coaster Database
203 cm 2
Coaster
Double Loop
The Villain
Mean Streak
Raptor
The Beast
Vortex
Titan
Shockwave
Maximum
Height (ft)
95
120
161
137
110
148
255
116
70 m 2
www.pre-alg.com/self_check_quiz
Simplify.
52. 2 81 3 53. 256 8 5
54. ( 9 36 ) ( 16 100 ) 55. (1 7) (121 7)
Lesson 9-1 Squares and Square Roots 439