Define a function, f , that determines the volume of a sphere in terms of the number of seconds, t , since its radius started increasing at a rate of 3 cm per second from an initial radius length of 0 cm. (Recall that the volume of a sphere, V , is given by 4 3 π r 3 .)
Write an expression to represent the sphere's radius (in cm) in terms of the number of seconds, t , since the radius started growing. r =