Martin is a manager at a restaurant. He receives a straight commission of 8% on food sales for the month. What were his March earnings if the restaurant sold $31,902 in food?

D

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.