(a) Surface area of a sphere:
Solving for r:
The surface area of a ball is measured to be A = 95 cm2.
(a) Write an equation for the radius of the ball, r, treating it as a sphere, in terms of its surface area.
(b) The mass is measured to be M = 45 g. Calculate its density ρ in g/cm3.
(c) What is the density Pkg/m3 in kg m3?