Which equation represents the graphed function? PLZ HELPP ME

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?

Find the value of the variable and the length of each chord for #5 and #6.

Given that s is the centroid of triangle mno, find sq.