Please help me with this question

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?

Which is the scale factor proportion for the enlargement shown?

Benefit(s) from large economies of scale, in which the costs of goods decrease as output increases. natural monopolles perfect competition