Which expression is equivalent to x1/2y5/2 in simplified form?
a. radical xy^5
b. radical xy
c. y^2 radical xy
d. y^4 radical xy

At a pizza shop 70% of the customers order a pizza 25% of the customers order a salad and 15% of the customers order both a pizza and a salad if s customer is chosen at random what is the probability that he or she orders either a pizza or a salad