Refer to ourÂ 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.

Evaluate each exponential expression

Question 1.
112 ___________
Multiply the base (11) by itself the number of times indicated by the exponent (2). Then find the product of all the terms.
112 = 11 Ã— 11 = 121

Question 2.
25 ____________
25 = 2 Ã— 2 Ã— 2 Ã— 2 Ã— 2 = 32

Question 3.
($$\frac{1}{5}$$)3 ___________
($$\frac{1}{5}$$)3 = $$\frac{1}{5}$$ Ã— $$\frac{1}{5}$$ Ã— $$\frac{1}{5}$$ = ($$\frac{1}{125}$$)

(0.3)2 ___________
(0.3)2 = $$\frac{3}{10}$$ Ã— $$\frac{3}{10}$$ = $$\frac{9}{100}$$ = 0.09

Question 5.
2.13 ____________
2.13 = 2.1 Ã— 2.1 Ã— 2.1 = 9.261

Question 6.
0.13 ____________
(0.1)3 = $$\frac{1}{10}$$ Ã— $$\frac{1}{10}$$ Ã— $$\frac{1}{10}$$ = $$\frac{1}{1000}$$ = 0.001

Question 7.
($$\frac{9.6}{3}$$)2 ___________
($$\frac{9.6}{3}$$)2 = (3.2)2 = 3.2 Ã— 3.2 = 10.24

Question 8.
1003 ____________
(100)3 = 100 Ã— 100 Ã— 100 = 1000000

Round to the underlined place.

Question 9.
2.374 _____
2.374 â†’ 2.37

Question 10.
126.399 _____
126.399 â†’ 126

Question 11.
13.9577 _____
13.9577 â†’ 14.0

42.690 _________
42.690 â†’ 42.69

Question 13.
134.95 _____
134.95 â†’ 135.0

Question 14.
2.0486 ______
2.0486 â†’ 2.0

Question 15.
63.6352 _______
63.6352 â†’ 63.64

Question 16.
98.9499 ________
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 â†’ 98.9

Simplify each expression.

Question 17.
3.14 (5)2 (10) _______
To simplify the expression, we simplify the exponent and we multiply from left to right.
3.14 âˆ™ (5)2 âˆ™ 10 = 3.14 âˆ™ 25 âˆ™ 10
= 78.5 âˆ™ 10
= 785

$$\frac{1}{3}$$(3.14) (3)2 (5)
($$\frac{1}{3}$$) Ã— (3.14) Ã— (3)2 Ã— (5) = 3 Ã— 3.14 Ã— 5 = 47.1

Question 19.
$$\frac{4}{3}$$ (3.14) (3)3 __________
($$\frac{4}{3}$$) Ã— (3.14) Ã— 27 = 4 Ã— 3.14 Ã— 9 = 113.04

Question 20.
$$\frac{4}{3}$$ (3.14) (6)3 _______
($$\frac{4}{3}$$) Ã— (3.14) Ã— (63) = ($$\frac{4}{3}$$) Ã— 3.14 Ã— 216 = 904.32

Question 21.
3.14 (4)2 (9) _______
3.14 Ã— (42) Ã— 9 = 3.14 Ã— 16 Ã— 9 = 452.16

Question 22.
$$\frac{1}{3}$$(3.14) (9)2 ($$\frac{2}{3}$$)
($$\frac{1}{3}$$) Ã— ($$\frac{2}{3}$$) Ã— (92) Ã— 3.14 = ($$\frac{1}{3}$$) Ã— ($$\frac{2}{3}$$) Ã— 81 Ã— 3.14 = 2 Ã— 3.14 Ã— 9 = 56.52

Visualize Vocabulary

Use the âœ“ 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 __________.
A three-dimensional figure that has one vertex and one circular base is a cone.

A three-dimensional figure with all points the same distance from the center is a __________.
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 _________.
A three-dimensional figure that has two congruent circular bases is a cylinder.

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.

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