| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.44 |
| Score | 0% | 69% |
The dimensions of this cylinder are height (h) = 8 and radius (r) = 4. What is the volume?
| 384π | |
| 3π | |
| 128π | |
| 392π |
The volume of a cylinder is πr2h:
v = πr2h
v = π(42 x 8)
v = 128π
Solve for c:
c2 + 2c - 24 = 0
| -3 or -7 | |
| 4 or -8 | |
| 3 or -5 | |
| 4 or -6 |
The first step to solve a quadratic equation that's set to zero is to factor the quadratic equation:
c2 + 2c - 24 = 0
(c - 4)(c + 6) = 0
For this expression to be true, the left side of the expression must equal zero. Therefore, either (c - 4) or (c + 6) must equal zero:
If (c - 4) = 0, c must equal 4
If (c + 6) = 0, c must equal -6
So the solution is that c = 4 or -6
The formula for the area of a circle is which of the following?
a = π d |
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a = π d2 |
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a = π r2 |
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a = π r |
The circumference of a circle is the distance around its perimeter and equals π (approx. 3.14159) x diameter: c = π d. The area of a circle is π x (radius)2 : a = π r2.
A trapezoid is a quadrilateral with one set of __________ sides.
parallel |
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equal length |
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right angle |
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equal angle |
A trapezoid is a quadrilateral with one set of parallel sides.
A(n) __________ is two expressions separated by an equal sign.
formula |
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problem |
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expression |
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equation |
An equation is two expressions separated by an equal sign. The key to solving equations is to repeatedly do the same thing to both sides of the equation until the variable is isolated on one side of the equal sign and the answer on the other.