A football game started at 4:10 p. m. and ended at 6:00 p. m. There was a 15 minute break after the first half of the game. How much time is spent on actual play?

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.