F p, q, and r are rational numbers, which of the following equations is/are true?

I) p × (q + r) = (p × q) + (p × r)
II) p × (q - r) = (p × q) - (p × r)
III) p × (q × r) = (p × q) × (p × r)
IV) p + (q × r) = (p + q) × (p + r)

Which number is irrational? a) 16 b) 18 c) 25 d) 36

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?

What are the coordinates of the point that is 1/3 of the way from a to b? a (2,-3) b (2,6)