Question

The volume of a sphere is given by V=(4)(3.14)(r^3)/3 where r is the radius of the sphere. what is the density in g/mL of a sphere which weighs 2.00lb and has a radius of 3.50 inches?

Answer 1

mass=(convert 2lb ==> grams)
radius=(convert 3.5 inches ==>m^3==>L)

then replace r in equation, and find volume.

Then use density=mass/volume ;)