| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.51 |
| Score | 0% | 70% |
What is the circumference of a circle with a diameter of 8?
| 14π | |
| 11π | |
| 8π | |
| 18π |
The formula for circumference is circle diameter x π:
c = πd
c = 8π
Order the following types of angle from least number of degrees to most number of degrees.
right, obtuse, acute |
|
acute, right, obtuse |
|
right, acute, obtuse |
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acute, obtuse, right |
An acute angle measures less than 90°, a right angle measures 90°, and an obtuse angle measures more than 90°.
The dimensions of this cylinder are height (h) = 8 and radius (r) = 7. What is the volume?
| 392π | |
| 175π | |
| 147π | |
| 128π |
The volume of a cylinder is πr2h:
v = πr2h
v = π(72 x 8)
v = 392π
Breaking apart a quadratic expression into a pair of binomials is called:
factoring |
|
normalizing |
|
squaring |
|
deconstructing |
To factor a quadratic expression, apply the FOIL (First, Outside, Inside, Last) method in reverse.
If a = -9 and z = 7, what is the value of a(a - z)?
| -180 | |
| -126 | |
| 144 | |
| -162 |
To solve this equation, replace the variables with the values given and then solve the now variable-free equation. (Remember order of operations, PEMDAS, Parentheses, Exponents, Multiplication/Division, Addition/Subtraction.)
a(a - z)
1(-9)(-9 - 7)
1(-9)(-16)
(-9)(-16)
144