The md orders 75mg of an elixir to be given per day. available is 125mg/5ml. what should be administered every 12 hours?

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?