Erica brought three and a half yards of fabric if she uses two thirds of it how much will she have left

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?

If square root x = -7, then x= -49 true or false

What is the result of the following division?