| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.34 |
| Score | 0% | 67% |
A cylinder with a radius (r) and a height (h) has a surface area of:
4π r2 |
|
2(π r2) + 2π rh |
|
π r2h |
|
π r2h2 |
A cylinder is a solid figure with straight parallel sides and a circular or oval cross section with a radius (r) and a height (h). The volume of a cylinder is π r2h and the surface area is 2(π r2) + 2π rh.
Simplify (y + 5)(y + 5)
| y2 - 25 | |
| y2 - 10y + 25 | |
| 28 | |
| y2 + 10y + 25 |
To multiply binomials, use the FOIL method. FOIL stands for First, Outside, Inside, Last and refers to the position of each term in the parentheses:
(y + 5)(y + 5)
(y x y) + (y x 5) + (5 x y) + (5 x 5)
y2 + 5y + 5y + 25
y2 + 10y + 25
The dimensions of this cylinder are height (h) = 7 and radius (r) = 4. What is the surface area?
| 108π | |
| 88π | |
| 104π | |
| 210π |
The surface area of a cylinder is 2πr2 + 2πrh:
sa = 2πr2 + 2πrh
sa = 2π(42) + 2π(4 x 7)
sa = 2π(16) + 2π(28)
sa = (2 x 16)π + (2 x 28)π
sa = 32π + 56π
sa = 88π
The dimensions of this cube are height (h) = 9, length (l) = 1, and width (w) = 2. What is the volume?
| 126 | |
| 18 | |
| 8 | |
| 96 |
The volume of a cube is height x length x width:
v = h x l x w
v = 9 x 1 x 2
v = 18
Which of the following expressions contains exactly two terms?
binomial |
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quadratic |
|
polynomial |
|
monomial |
A monomial contains one term, a binomial contains two terms, and a polynomial contains more than two terms.