Which expression is equal to csc x, written in terms of cos x?

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?

Consider the function f(x)=-5x+3 what is f(-2)

Answer pls man im trying to get out of summer school