If there are 21 values in a data set in order from smallest to largest, what is the first quartile of the data set

Three runners competed in a race data were collected at each mile mark for each runner if the runner ran at a constant pace the data would be linear

Monthly water bills for a city have a mean of $108.43 and a standard deviation of $36.98. find the probability that a randomly selected bill will have an amount greater than $173, which the city believes might indicate that someone is wasting water. would a bill that size be considered unusual?

Which statement is true about the discontinuities of the function f(x) = x-5/ 3x^2-17x-28