Volleyball: mean = 86, MAD = 19.6
basketball: mean = 185, MAD = 17.7
The variation in the attendances is about the same, but basketball has a greater attendance.
Express the difference in the measures of center as a multiple of the measure of variation. Round your answers to the nearest tenth.

The difference in the means is about ? to ? times the MAD.

First step is to get rid of the square root. remember that a square root is the same as raising to the (1/2) power. see below: multiply exponents per exponent rules to get: remember you subtract exponents from the denominator and add exponents in the numerator so: simplify further: so a is the correct choice. if you don't understand this google exponent rules and it will you understand. look at the image results.