Rewrite the rational expression as an equivalent rational expression whose denominator is the given polynomial 13/(5a^2)=blank/(10a^2b^3)

Which of those sequences is a geometric sequence

Iknow its nothing to do with education, but what type of thing should i wrote here? ? : ) its for mcdonald's btw.

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