Before a race, you start 4 5 8 feet behind your friend. at the halfway point, you are 3 2 3 feet ahead of your friend. what is the change in distance between you and your friend from the beginning of the race?

1 3 5 feet :) hope this helps

41% increase since the beginning of race

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.