The large sphere has a diameter of 20 feet.

a large sphere has a diameter of 20 feet. a smaller sphere with a radius of 4 feet is cut out of the center of the larger sphere.

which expression represents the volume, in cubic units, of the shaded part of the sphere?

four-thirdsπ(103) + four-thirdsπ(43)
four-thirdsπ(103) – four-thirdsπ(43)
four-thirdsπ(203) + four-thirdsπ(43)
four-thirdsπ(203) – four-thirdsπ(43)