I need to know the math problem

Suppose the probability of selling a car today is 0.28. find the odds against selling a car today.

Write the system of equations represented by the matrix. 0 1 2 4 -2 3 6 9 1 0 1 3

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?