The formula for the volume \( V \) of a cylinder is given by:
\[ V = \pi r^2 h \]
where \( r \) is the radius of the base and \( h \) is the height of the cylinder.
In this case, the radius \( r = 2.5 \) inches and the height \( h = 9 \) inches. Plugging these values into the formula, we have:
\[ V = \pi (2.5)^2 (9) \]
Thus, the correct expression for the volume of the cylinder is:
\[ \pi(2.5)^2(9) \text{ in}^3 \]
The correct response from the options provided is:
\(\pi(2.5)^2(9) \text{ in}^3\)