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:

\( \sqrt{\frac{16}{25}} \)
\( \frac{\sqrt{16}}{\sqrt{25}} \)
\( \frac{\sqrt{4^2}}{\sqrt{5^2}} \)
\(\frac{4}{5}\)

By buying two shirts, Monty will save $16 x \( \frac{20}{100} \) = \( \frac{$16 x 20}{100} \) = \( \frac{$320}{100} \) = $3.20 on the second shirt.

First, solve for \( \left|a - 6\right| \):

\( \left|a - 6\right| \) - 8 = -2
\( \left|a - 6\right| \) = -2 + 8
\( \left|a - 6\right| \) = 6

The value inside the absolute value brackets can be either positive or negative so (a - 6) must equal + 6 or -6 for \( \left|a - 6\right| \) to equal 6:

So, a = 0 or a = 12.

A factor is a positive integer that divides evenly into a given number. For example, the factors of 8 are 1, 2, 4, and 8.

A number in scientific notation has the format 0.000 x 10^exponent. To convert to scientific notation, move the decimal point to the right or the left until the number is a decimal between 1 and 10. The exponent of the 10 is the number of places you moved the decimal point and is positive if you moved the decimal point to the left and negative if you moved it to the right:

6,189,000 in scientific notation is 6.189 x 10⁶