The volume of a sphere is calculated like so: v = 4*pi*r^3/3 so half sphere will have half that volume: v = (<span>4*pi*r^3/3)(1/2) </span>v = <span>4*pi*r^3/6 </span>plug in the data: v = <span>4*pi*(10)^3/6 </span>v = 2094.4 that is the volume of the half sphere