Definition: This is the set of x-values or of the independent variable(s) for which a function or relation is
defined
Example: The set of numbers (1,2,3,4} for the function y=10x where the range is 10, 20, 30, 40

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?

A. 127 cm^2 b. 144.5 cm^2 c. 172 cm^2 d. 50 cm^2

True or false? a circle could be circumscribed about the quadrilateral below.