Which of the relations given by the following sets of ordered pairs is a function? A. {(1,2),(2,3),(3,4),(2,1),(1,0)}
B. {(2,−8),(6,4),(−3,9),(2,0),(−5,3)}< br /> C. {(1,−3),(1,−1),(1,1),(1,3),(1,5)} D. {(−2,5),(7,5),(−4,0),(3,1),(0,−6)}

Sara goes on a slingshot ride in an amusement park. she is strapped into a spherical ball that has a radius 3*10^2 of centimeters. what is the volume of air in the spherical ball? use this formula: volume of a sphere=4/3pi,r^3 , where r is the sphere’s radius.