Hello Kylie,

First, let's notice that we're dealing with a hemisphere, which is really HALF of a sphere.

Formula for volume of a sphere: V_{S} = (4/3) * π*r^{3} where r is the radius of the sphere

So the volume of a hemisphere will be HALF the volume of a sphere: **V**_{H}** = (1/2) * (4/3) * π*r**^{3}

You're given the diameter of the sphere d = 7.6 m, so radius is HALF the diameter: r = (1/2) * 7.6 = 3.8 m

Plug it in formula for V_{H}: V_{H} = (1/2) * (4/3) * π * 3.8^{3} = 112.92364805 cubic meters

Round to nearest tenth ----> **V**_{H}** = 112.9 cubic meters**

Cheers.