To multiply fractions, multiply the numerators together and then multiply the denominators together:

\( \frac{2}{7} \) x \( \frac{1}{9} \) = \( \frac{2 x 1}{7 x 9} \) = \( \frac{2}{63} \) = \(\frac{2}{63}\)

The factors of a number are all positive integers that divide evenly into the number. The factors of 32 are 1, 2, 4, 8, 16, 32.

To take the square root of a fraction, break the fraction into two separate roots then calculate the square root of the numerator and denominator separately:

\( \sqrt{\frac{25}{4}} \)
\( \frac{\sqrt{25}}{\sqrt{4}} \)
\( \frac{\sqrt{5^2}}{\sqrt{2^2}} \)
\( \frac{5}{2} \)
2\(\frac{1}{2}\)

April scored 90% on the test meaning she earned 90% of the possible points on the test. There were 100 possible points on the test so she earned 100 x 0.9 = 90 points. Each question is worth 2 points so she got \( \frac{90}{2} \) = 45 questions right.

To find the average of these 4 numbers add them together then divide by 4:

\( \frac{10 + 8 + 12 + 6}{4} \) = \( \frac{36}{4} \) = 9