If p and q are rational numbers and q is not zero, what do you know about - (p/q), (- p)/q and p/(- q)

Monthly water bills for a city have a mean of $108.43 and a standard deviation of $32.09. find the probability that a randomly selected bill will have an amount greater than $155, which the city believes might indicate that someone is wasting water. would a bill that size be considered unusual?

6cm10 cma conical paper cup has dimensions as shown in the diagram. how much water can the cup hold when full?

What are the greatest common factor of 75 and 30