Help please! Due in 20 min... FIND THE DISTANCE BETWEEN EACH PAIR OF POINTS ROUND TO THE NEAREST 10TH

Answer is 5, Just had this homework last week

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.