Final answer:
The expression for the volume of a pyramid with a square base and sides is V = (1/3) * s^3.
Step-by-step explanation:
The expression for the volume of a pyramid with a square base and side length 's' can be found using the formula V = (1/3) * s^2 * s. Simplifying this expression gives us the expression V = (1/3) * s^3, which represents the volume of the pyramid.
Learn more about Volume of a pyramid