Which proportion can you use to derive the equation of the line

The difference between tax advoidance and tax evasion

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?

Consider that lines b and c are parallel. what is the value of x? what is the measure of the smaller angle?