Item 8 a store hands out 900 reward cards. customers scan their cards in the store to find out what reward they receive. the probability that a customer receives a $25 gift card is 112. how many customers receive a $25 gift card?

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.