Refer to our Texas Go Math Grade 8 Answer Key Pdf to score good marks in the exams. Test yourself by practicing the problems from Texas Go Math Grade 8 Module 9 Answer Key Volume.

## Texas Go Math Grade 8 Module 9 Answer Key Volume

**Texas Go Math Grade 8 Module 9 Are You Ready? Answer Key**

**Evaluate each exponential expression**

Question 1.

11^{2} ___________

Answer:

Multiply the base (11) by itself the number of times indicated by the exponent (2). Then find the product of all the terms.

11^{2} = 11 × 11 = 121

Question 2.

2^{5} ____________

Answer:

2^{5} = 2 × 2 × 2 × 2 × 2 = 32

Question 3.

(\(\frac{1}{5}\))^{3} ___________

Answer:

(\(\frac{1}{5}\))^{3} = \(\frac{1}{5}\) × \(\frac{1}{5}\) × \(\frac{1}{5}\) = (\(\frac{1}{125}\))

Question 4.

(0.3)^{2} ___________

Answer:

(0.3)^{2} = \(\frac{3}{10}\) × \(\frac{3}{10}\) = \(\frac{9}{100}\) = 0.09

Question 5.

2.1^{3} ____________

Answer:

2.1^{3} = 2.1 × 2.1 × 2.1 = 9.261

Question 6.

0.1^{3} ____________

Answer:

(0.1)^{3} = \(\frac{1}{10}\) × \(\frac{1}{10}\) × \(\frac{1}{10}\) = \(\frac{1}{1000}\) = 0.001

Question 7.

(\(\frac{9.6}{3}\))^{2} ___________

Answer:

(\(\frac{9.6}{3}\))^{2} = (3.2)^{2} = 3.2 × 3.2 = 10.24

Question 8.

100^{3} ____________

Answer:

(100)^{3} = 100 × 100 × 100 = 1000000

**Round to the underlined place.**

Question 9.

2.374 _____

Answer:

2.374 → 2.37

Question 10.

126.399 _____

Answer:

126.399 → 126

Question 11.

13.9577 _____

Answer:

13.9577 → 14.0

Question 12.

42.690 _________

Answer:

42.690 → 42.69

Question 13.

134.95 _____

Answer:

134.95 → 135.0

Question 14.

2.0486 ______

Answer:

2.0486 → 2.0

Question 15.

63.6352 _______

Answer:

63.6352 → 63.64

Question 16.

98.9499 ________

Answer:

98.9499

The digit to be rounded is 9. The digit to its right is 4, which is less than 5, so the rounded number is 98.9.

98.9499 → 98.9

**Simplify each expression.**

Question 17.

3.14 (5)^{2} (10) _______

Answer:

To simplify the expression, we simplify the exponent and we multiply from left to right.

3.14 ∙ (5)^{2} ∙ 10 = 3.14 ∙ 25 ∙ 10

= 78.5 ∙ 10

= 785

Question 18.

\(\frac{1}{3}\)(3.14) (3)^{2} (5)

Answer:

(\(\frac{1}{3}\)) × (3.14) × (3)^{2} × (5) = 3 × 3.14 × 5 = 47.1

Question 19.

\(\frac{4}{3}\) (3.14) (3)^{3} __________

Answer:

(\(\frac{4}{3}\)) × (3.14) × 27 = 4 × 3.14 × 9 = 113.04

Question 20.

\(\frac{4}{3}\) (3.14) (6)^{3} _______

Answer:

(\(\frac{4}{3}\)) × (3.14) × (6^{3}) = (\(\frac{4}{3}\)) × 3.14 × 216 = 904.32

Question 21.

3.14 (4)^{2} (9) _______

Answer:

3.14 × (4^{2}) × 9 = 3.14 × 16 × 9 = 452.16

Question 22.

\(\frac{1}{3}\)(3.14) (9)^{2} (\(\frac{2}{3}\))

Answer:

(\(\frac{1}{3}\)) × (\(\frac{2}{3}\)) × (9^{2}) × 3.14 = (\(\frac{1}{3}\)) × (\(\frac{2}{3}\)) × 81 × 3.14 = 2 × 3.14 × 9 = 56.52

**Texas Go Math Grade 8 Module 9 Reading Start-Up Answer Key**

**Visualize Vocabulary**

Use the ✓ words to complete the empty columns in the chart. You may use words more than once.

**Understand Vocabulary**

**Complete the sentences using the preview words.**

Question 1.

A three-dimensional figure that has one vertex and one circular base is a __________.

Answer:

A three-dimensional figure that has one vertex and one circular base is a cone.

Question 2.

A three-dimensional figure with all points the same distance from the center is a __________.

Answer:

A three-dimensional figure with all points the same distance from the center is a sphere.

Question 3.

A three-dimensional figure that has two congruent circular bases is a _________.

Answer:

A three-dimensional figure that has two congruent circular bases is a cylinder.

**Active Reading**

Three-Panel Flip Chart Before beginning the module, create a three-panel flip chart to help you organize what you learn. Label each flap with one of the lesson titles from this module. As you study each lesson, write important ideas like vocabulary, properties, and formulas under the appropriate flap.