| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.30 |
| Score | 0% | 66% |
A cylinder with a radius (r) and a height (h) has a surface area of:
π r2h2 |
|
4π r2 |
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2(π r2) + 2π rh |
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π r2h |
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.
Which of the following statements about math operations is incorrect?
all of these statements are correct |
|
you can add monomials that have the same variable and the same exponent |
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you can multiply monomials that have different variables and different exponents |
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you can subtract monomials that have the same variable and the same exponent |
You can only add or subtract monomials that have the same variable and the same exponent. For example, 2a + 4a = 6a and 4a2 - a2 = 3a2 but 2a + 4b and 7a - 3b cannot be combined. However, you can multiply and divide monomials with unlike terms. For example, 2a x 6b = 12ab.
Which of the following expressions contains exactly two terms?
binomial |
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monomial |
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polynomial |
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quadratic |
A monomial contains one term, a binomial contains two terms, and a polynomial contains more than two terms.
What is the circumference of a circle with a diameter of 17?
| 11π | |
| 6π | |
| 17π | |
| 15π |
The formula for circumference is circle diameter x π:
c = πd
c = 17π
The dimensions of this cube are height (h) = 4, length (l) = 9, and width (w) = 3. What is the surface area?
| 258 | |
| 306 | |
| 88 | |
| 150 |
The surface area of a cube is (2 x length x width) + (2 x width x height) + (2 x length x height):
sa = 2lw + 2wh + 2lh
sa = (2 x 9 x 3) + (2 x 3 x 4) + (2 x 9 x 4)
sa = (54) + (24) + (72)
sa = 150