What was the percentage increase in average miles flown per passenger from 1966 to 1976?

Solve the equation 3x2 + 19x + 9 = 0 to the nearest tenth.

The graph represents the gallons of water in a water tank with respect to the number of hours since it was completely filled

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?