Mean of 130 and 148
mean of 196 and 122
mean of 154 and 157

Describe the 2 algebraic methods you can use to find the zeros of the function f(t)=-16t^2+400.

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?

Which of the following contains a variable?