| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 2.76 |
| Score | 0% | 55% |
What is the circumference of a circle with a radius of 19?
| 18π | |
| 26π | |
| 22π | |
| 38π |
The formula for circumference is circle diameter x π. Circle diameter is 2 x radius:
c = πd
c = π(2 * r)
c = π(2 * 19)
c = 38π
A cylinder with a radius (r) and a height (h) has a surface area of:
π r2h |
|
2(π r2) + 2π rh |
|
π r2h2 |
|
4π r2 |
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.
If the length of AB equals the length of BD, point B __________ this line segment.
bisects |
|
intersects |
|
trisects |
|
midpoints |
A line segment is a portion of a line with a measurable length. The midpoint of a line segment is the point exactly halfway between the endpoints. The midpoint bisects (cuts in half) the line segment.
Solve for y:
-2y + 3 > 9 + 7y
| y > -\(\frac{3}{7}\) | |
| y > \(\frac{4}{9}\) | |
| y > -\(\frac{3}{4}\) | |
| y > -\(\frac{2}{3}\) |
To solve this equation, repeatedly do the same thing to both sides of the equation until the variable is isolated on one side of the > sign and the answer on the other.
-2y + 3 > 9 + 7y
-2y > 9 + 7y - 3
-2y - 7y > 9 - 3
-9y > 6
y > \( \frac{6}{-9} \)
y > -\(\frac{2}{3}\)
The dimensions of this cube are height (h) = 7, length (l) = 7, and width (w) = 6. What is the surface area?
| 266 | |
| 88 | |
| 158 | |
| 52 |
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 7 x 6) + (2 x 6 x 7) + (2 x 7 x 7)
sa = (84) + (84) + (98)
sa = 266