# Math 9 Module 2

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Quizzes Created: 2 | Total Attempts: 949
Questions: 15 | Attempts: 459

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Practice quiz for Module 2

• 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

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.

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

• A.

True

• B.

False

A. True
Explanation
a negative number to an odd exponent will give a negative answer

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• 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

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

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

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

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

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

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

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

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

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

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

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

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

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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