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The parabola x = y² - 9 opens: a.)up b.)down c.) right d.)left

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.

Perform the indicated operation. y^2 + 3y - 10 / 3y + 15