Question

What is the radius of a copper sphere (density = 8.92 g/cm^3) whose mass is 3.75 g? The volume of a sphere is given by the equation V=(4/3)(pi)r^3.

Please help me get this one started!

Answer 1

the formula for density is: \(\sf density=\dfrac{mass}{volume}\)

Answer 2

So plug stuff in: \(\sf 8.92 ~g/cm^3=\dfrac{3.75~ g}{\dfrac{4}{3}\pi r^3}\)

solve for r.