Please help Determine which of the following
relations is NOT a function.
A. {(-2, 1), (2, -1), (-1, 2), (1, 1)}
B. {(3, 1), (4, -1), (5,2), (1, -1)}
C. {(-2,-1), (3,-1), (3, 2), (2, 1)

What is the volume of the sphere shown below with a radius of 3?

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?

How do the definitions, properties, and postulates you've learned about line segments, parallel lines, and angles to define the shapes of polygons