| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.45 |
| Score | 0% | 69% |
The formula for the area of a circle is which of the following?
c = π r |
|
c = π d2 |
|
c = π r2 |
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c = π d |
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.
If a = c = 8, b = d = 7, what is the area of this rectangle?
| 20 | |
| 64 | |
| 63 | |
| 56 |
The area of a rectangle is equal to its length x width:
a = l x w
a = a x b
a = 8 x 7
a = 56
Simplify 8a x 4b.
| 32a2b2 | |
| 32\( \frac{b}{a} \) | |
| 32\( \frac{a}{b} \) | |
| 32ab |
To multiply monomials, multiply the coefficients (the numbers that come before the variables) of each term, add the exponents of like variables, and multiply the different variables together.
8a x 4b = (8 x 4) (a x b) = 32ab
To multiply binomials, use the FOIL method. Which of the following is not a part of the FOIL method?
Odd |
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Inside |
|
Last |
|
First |
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.
What is the circumference of a circle with a radius of 3?
| 16π | |
| 1π | |
| 9π | |
| 6π |
The formula for circumference is circle diameter x π. Circle diameter is 2 x radius:
c = πd
c = π(2 * r)
c = π(2 * 3)
c = 6π