The mathematics faculty at a college consists of 4 professors, 10 associate professors,8 assistant professors, and 10 instructors. if one faculty member is randomly selected, find the probability of choosing a professor or an instructor.

44 *rounded real answer is 7/16

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.