Find the area of the shape

What values of x satisfy the inequality x^2-9x< 0? how is your answer shown on the graph?

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?

Which graph has figures that can undergo a similarity transformation to justify that they are similar? (obviously not the third one)