Mark spent 733.43 on some cds he purchased 7 cds what was the price of each cds

Can someone answer it, and plot it, for 20 points and brainliest answer? p.s. they're the same ! : )

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?

Write an equation for the function that includes the points (1,4/5) and (2,2/3)