Jacob has a 6 sided number cube. Each side was labeled with one number from 1 through 6. What is the probability that Jacob rolls a four. Total possible outcomes: Number of fours: P[Rolling a four]

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.