Can someone help me with pre-calc?

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?

15 there is a line that includes the point 0,10 and has a slope of 7/4. what is it’s equation in slope intercept form

1) you deposit $2,500 in an account that earns 4% simple interest. how much do you earn in eight years?