Please help I’ll mark you as brainliest if correct!

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?

Answer! if you don’t mind, can you explain

Determine if the equation defines y as a function of x: 2xy = 1. yes o no