Math 9 Module 2

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| By Seferguson

Seferguson

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Quizzes Created: 2 | Total Attempts: 953

Questions: 15 | Attempts: 463 | Updated: Mar 22, 2023

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Practice quiz for Module 2

Questions and Answers

1.

Which one of the following shows 13500000 in scientific notation?Note: ^ means the next number is an exponent.so:10³ = 10^3
- A.
  
  1.35 x 10^7
- B.
  
  135 x 10^5
- C.
  
  0.135 x 10^4
- D.
  
  1.35 x 10^-7
Correct Answer
A. 1.35 x 10^7

Explanation
the decimal needs to be moved 7 places to the left to get to 1.35 - 7 left is written as 10^7 (positive)

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2
0
2.

True or False?(-3)⁵ will give a negative answer
- A.
  
  True
- B.
  
  False
Correct Answer
A. True

Explanation
a negative number to an odd exponent will give a negative answer

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1
0
3.

Use your calculator. Round to 2 decimal places. 35.6 3.2 x 4.5
- A.
  
  50.16
- B.
  
  4.45
- C.
  
  5.60
- D.
  
  49.36
Correct Answer
B. 4.45

Explanation
on the calculator: 35.6 / (3.2 x 4.5) =

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4.

True or false?3^-3 = 1 27
- A.
  
  True
- B.
  
  False
Correct Answer
A. True

Explanation
The given statement is false. The subtraction of 3 from 3 is equal to 0, not 1. Therefore, the correct answer is False.

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5.

Write as a single power.(3²)(3³)
- A.
  
  3^6
- B.
  
  9^5
- C.
  
  3^5
- D.
  
  243
Correct Answer
C. 3^5

Explanation
The given expression is the product of two powers with the same base, 3. When multiplying powers with the same base, we add the exponents. In this case, the exponent of 3 is 5. Therefore, the simplified expression is 3^5.

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6.

Which of the following is NOT written in scientific notation?
- A.
  
  3.4 x 10^5
- B.
  
  3.00 x 10^-10
- C.
  
  2.21 x 10^3
- D.
  
  0.0321 x 10^4
Correct Answer
D. 0.0321 x 10^4

Explanation
Scientific notation has the main number between 1 and 10. 0.0321 is less than 1.

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7.

Find the value of x. Round to 2 decimal places.
- A.
  
  8.98
- B.
  
  7.21
- C.
  
  10.00
- D.
  
  3.23
Correct Answer(s)
A. 8.98
B. 7.21

Explanation
x = square root of (16 + 36)

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8.

A square has an area of 36 m². What is the length of each side?
- A.
  
  30 meters
- B.
  
  9 meters
- C.
  
  6 meters
- D.
  
  25 meters
Correct Answer
C. 6 meters

Explanation
length of a square's side = square root of the area

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9.

A square has an area of 36 m².What is the perimeter of the square?
- A.
  
  24 meters
- B.
  
  46 meters
- C.
  
  36 meters
- D.
  
  6 meters
Correct Answer
A. 24 meters

Explanation
perimeter = length of side x number of sides

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10.

A square has an area of 36 m².What is the length of the diagonal?
- A.
  
  15m
- B.
  
  10.78m
- C.
  
  6.00m
- D.
  
  8.49m
Correct Answer
D. 8.49m

Explanation
diagonal = square root of (36 + 36)

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11.

Evaluate:(4a²b³c⁴)(3ab²c³)
- A.
  
  12a^2b^6c^12
- B.
  
  7a^2b^6c^12
- C.
  
  12a^3b^5c^7
- D.
  
  7a^3b^5c^7
Correct Answer
C. 12a^3b^5c^7

Explanation
4x3 = 12
a^2 x a = a^3
b^3 x b^2 = b^5
c^4 x c^ 3 = c^7

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12.

Which of the following is the standard form of this number:1.44 x 10^-5
- A.
  
  1440000
- B.
  
  0.00000144
- C.
  
  14400000
- D.
  
  0.0000144
Correct Answer
D. 0.0000144

Explanation
negative exponent means decimal moves to the right 5 places

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13.

4.5 x 10⁷ x 4.5 x 10³
- A.
  
  20.25 x 10^10
- B.
  
  9 x 10^10
- C.
  
  20.25 x 10^21
- D.
  
  20.25 x 10^4
Correct Answer
A. 20.25 x 10^10

Explanation
4.5 x 4.5 = 20.25
add the exponents = 10^10

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14.

2.3 x 10^-5 x 3.4 x 10⁷ 1.8 x 10^-4Round to 2 decimal places
- A.
  
  4.34 x 10^-2
- B.
  
  14.08 x 10^3
- C.
  
  7.50 x 10^-4
- D.
  
  4.34 x 10^6
Correct Answer
D. 4.34 x 10^6

Explanation
(2.3 x 3.4)/1.8 = 4.34
Exponent:-5 + 7 - (-4) = 6

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15.

Evaluate: 3a²bIf: a=-4 and b=5
- A.
  
  -240
- B.
  
  240
- C.
  
  -120
- D.
  
  120
- E.
  
  3 x (-4x-4) x 5
Correct Answer
B. 240

Explanation
The expression 3a2b can be simplified by substituting the given values of a and b, which are -4 and 5 respectively. So, the expression becomes 3 x (-4 x -4) x 5. When we simplify this expression, we get -240. Therefore, the correct answer is -240.

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Current Version
Mar 22, 2023

Quiz Edited by
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Oct 29, 2009

Quiz Created by
Seferguson

Math 9 Module 2

Which one of the following shows 13500000 in scientific notation?Note: ^ means the next number is an exponent.so:103 = 10^3

True or False?(-3)5 will give a negative answer

Use your calculator. Round to 2 decimal places. 35.6 3.2 x 4.5

True or false?3-3 = 1 27

Write as a single power.(32)(33)

Which of the following is NOT written in scientific notation?

Find the value of x. Round to 2 decimal places.

A square has an area of 36 m2. What is the length of each side?

A square has an area of 36 m2.What is the perimeter of the square?

A square has an area of 36 m2.What is the length of the diagonal?

Evaluate:(4a2b3c4)(3ab2c3)

Which of the following is the standard form of this number:1.44 x 10-5

4.5 x 107 x 4.5 x 103

2.3 x 10-5 x 3.4 x 107 1.8 x 10-4Round to 2 decimal places

Evaluate: 3a2bIf: a=-4 and b=5

Which one of the following shows 13500000 in scientific notation?Note: ^ means the next number is an exponent.so:10³ = 10^3

True or False?(-3)⁵ will give a negative answer

True or false?3^-3 = 1 27

Write as a single power.(3²)(3³)

A square has an area of 36 m². What is the length of each side?

A square has an area of 36 m².What is the perimeter of the square?

A square has an area of 36 m².What is the length of the diagonal?

Evaluate:(4a²b³c⁴)(3ab²c³)

Which of the following is the standard form of this number:1.44 x 10^-5

4.5 x 10⁷ x 4.5 x 10³

2.3 x 10^-5 x 3.4 x 10⁷ 1.8 x 10^-4Round to 2 decimal places

Evaluate: 3a²bIf: a=-4 and b=5