42. This pattern shows the first five steps in constructing the Sierpinski Triangle. Use a pattern to describe the figures.

    
    Image Long Description

Standardized Test Prep

SAT/ACT

43. Which of the following is the best statement about the graph?

    

    1. After 4 weeks, the plant will be 7 inches tall.
    2. The plant was 1 inch tall at the beginning of the experiment.
    3. After 2 weeks, the plant was 3 inches tall.
    4. After 6 weeks, the plant will be 8 inches tall.
44. Which is the 7th number in this pattern?

    8, 13, 18, 23, …

    6. 28
    7. 33
    8. 38
    9. 43

Short Response

45. Look at the pattern shown.

    144, 72, 36, …

    1. What is a rule for the pattern?
    2. What is the first non-integer number in this pattern?

Mixed Review

See p. 967.

Simplify each expression.

46. 3.6 + ( − 1.7 ) 3.6 plus open negative 1.7 close
47. 1.2 − 5 1.2 minus 5
48. ( − 3 ) open negative 3 close   ( − 9 ) open negative 9 close
49. 0 ( − 8 ) 0 open negative 8 close
50. − 2.8 ÷ 7 negative 2.8 divides 7
51. − 35 ÷ ( − 5 ) negative 35 divides open negative 5 close

Get Ready! To prepare for Lesson 1-2, do Exercises 52–57.

See p. 964.

Write each number as a percent.

52. 0.5
53. 0.25
54. 1 3 1 third
55. 1 2 5 1 , and 2 fifths
56. 1.72
57. 1.23

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