So,
The formula for the volume of a sphere is:
\(V= \frac{4}{3}\pi r^3\)
Approximating 3.14 for pi and substituting the given values we get:
\(V= \frac{4}{3}(3.14) (2.125)^3\)
\(V= \frac{4}{3}(3.14) (9.6)\)
\(V= \frac{4}{3}(30.14)\)
\(V = 40.19\ in.^3\)