If John has pairs of red, orange, yellow, blue, green, white, and black socks, how many orders can he wear them in over 7 days? Repetition is not allowed because John puts his socks in the wash at the end of the day? 7^7
49
7!
42

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.