Atotal of 13/4 cups of baking soda was used for multiple trials of a science experiment. each trial used 3/4 cup of baking soda. how many trials were conducted.

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