| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.43 |
| Score | 0% | 69% |
The dimensions of this cylinder are height (h) = 1 and radius (r) = 7. What is the surface area?
| 60π | |
| 36π | |
| 120π | |
| 112π |
The surface area of a cylinder is 2πr2 + 2πrh:
sa = 2πr2 + 2πrh
sa = 2π(72) + 2π(7 x 1)
sa = 2π(49) + 2π(7)
sa = (2 x 49)π + (2 x 7)π
sa = 98π + 14π
sa = 112π
What is 9a8 + 9a8?
| 18 | |
| 81a16 | |
| 18a8 | |
| a816 |
To combine like terms, add or subtract the coefficients (the numbers that come before the variables) of terms that have the same variable raised to the same exponent.
9a8 + 9a8 = 18a8
Order the following types of angle from least number of degrees to most number of degrees.
right, acute, obtuse |
|
right, obtuse, acute |
|
acute, obtuse, right |
|
acute, right, obtuse |
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) = 6 and radius (r) = 9. What is the volume?
| 36π | |
| 576π | |
| 486π | |
| 96π |
The volume of a cylinder is πr2h:
v = πr2h
v = π(92 x 6)
v = 486π
The dimensions of this cube are height (h) = 2, length (l) = 4, and width (w) = 7. What is the volume?
| 504 | |
| 56 | |
| 126 | |
| 189 |
The volume of a cube is height x length x width:
v = h x l x w
v = 2 x 4 x 7
v = 56