9x+6y2+15xy??
pleasedd!!

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?

The quadratic function h(t)=-16.1t^2+150 choose the graph representation

Anyone know these questions? i need ,.