Help solve for x you ant gotta solve for the other one

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?

In an improper fraction, is the numerator equal to, less than, or greater than the denominator

Out of 50 students surveyed, 16 have a dog. based on these results, predict how many of the 280 students in the school have a dog.