PLEASE HELP ASAP!! Find the error in the students work. Explain the mistake they made and provide the correct answer

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?

Solve the equation -9p - 17 =10 a -3 b. 16 c. 18 d -16

Rewrite the following quadratic functions in intercept or factored form. show your work. y = 4x^2 - 19x- 5