Acarpenter is building a staircase from the first floor to the second floor of a house. the distance between floors is 3.3m. each step rises 22cm. not counting either floor itself, how many steps will there be?

Monthly water bills for a city have a mean of $108.43 and a standard deviation of $36.98. find the probability that a randomly selected bill will have an amount greater than $173, which the city believes might indicate that someone is wasting water. would a bill that size be considered unusual?