4 > of 5 6) The radius and volume of a sphere are related by the following equation: V = =mr3 . Use this information and that the independent variable is time to answer the following questions. a) Write an equation the relates dt to b) The radius of a sphere increases at a constant rate of 2 inches per second. When the radius is 10 inches, at what rate is the volume of the sphere changing? Show all work. Give an exact value