F(x)=2/3x+4, x=-6 evaluate the function?

Can someone me with my hwplz(only the circled ones)

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?

Jordan got 27 out of 90 correct on his test . what fraction of the marks did her get correct