Four friends have decided to visit the art museum. admission costs $5.75 per person. if x represents the total cost for the four friends to go to the museum, which equation is true? a. $5.75 • x = 4 b. 4 • $5.75 = x c. 4 + x = $5.75 d. 4 • x = $5.75

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.