**Which of the following is an appropriate unit of measure to express the length of a width of a window?**

Hectometers

Kilometers

Centimeter

Liters

*Correct Answer : C*

The SI units of measuring length is meter. However, a meter can be a large unit or small quantity depending what is being measured. Therefore, derived units of meters are used to measure the length of an object. In our case, centimeters is the appropriate unit to measure the width of the window.

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### Correct Answer is D

#### Explanation

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First, we subtract y/x from both sides of the equation

Thus, the formula for finding the value of z isÂ Â .

### Correct Answer is A

#### Explanation

we use the relation 1 L=1000 mL and organize our equation in such a way that L cancels as:

Thus, 0.65 L is 650 mL.

### Correct Answer is D

#### Explanation

To simplify this expression, we follow the order of operations as follows:

First, we start with the numerator and solve it as follows

[2(6+3*9)]

We start with multiplication in inner brackets, 3 * 9 = 27. The expression becomes

[2(6+27)]

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[2(33)]=2*33=66

Now, we solve for denominator, which is 6/2=3.

Thus, the expression is reduced into

The expression reduces into 22.

### Correct Answer is D

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An independent variable is a variable that is manipulated or changed in the experiment. From the given equation, x is variable that is changed to obtain the desired outcome, F(x). Therefore, x is an independent variable.

### Correct Answer is D

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we are asked to find the number of gallons a full tank holds. A full tank is treated as 1 whole.

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### Correct Answer is A

#### Explanation

Amount of salary will vary if the other three variables change. Therefore, salary is a dependent variable.

### Correct Answer is A

#### Explanation

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A histogram will be appropriate to represent the time the students wake up every day of the week. The histogram is used to represent the frequency of the variable with another variable. In our case the vertical axis will represent the number of students (frequency) while the time of waking up on the horizontal axis.

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9/20 is the same as 9 divided by 20, which is evaluated 9*÷*20. The value becomes 0.45.

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### Correct Answer is C

#### Explanation

we set the conversion equation to find the unknown unit. Arrange the equation such that the unwanted units cancel out and the wanted unit remains.

The value 365.76 cm is close to 365 cm. Therefore, 4 yards is approximately 365 cm.

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