Verify that {u1, u2} is an orthogonal set and then find the orthogonal projection of y onto span {u1, u2}. Y = (-1 4 3), u1 = (1 1 0), u2 = (-1 1 0)

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?

Is this a polynomial function? i need to know asap

Describe a situation that you could represent with the inequality x< 17