A hollow copper ball 20.0 cm outside diameter is 2.00 cm thick. Find its weight (a) in air and (b) in gasoline, and express these weights in N. The specific gravity of copper is 8.5, and the weight density of gasoline is .0067 N/cm^3. The formula for the volume of a sphere is V= 4.3πr^3. please help ill rate brainliest im so cooked