What is the role of reproduction, growth, development?

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.

Why do we perceive objects as retaining their brightness under different lighting levels?

The third stage of cellular respiration is (2 points)