PLS HELP ME!! WILL GIVE BRAINLY!!

Answer: 27/8 or 3 3/8
Step-by-step explanation:
For this problem, you can simply plug the side length, 2 1/2, into the variable, s. Let's change it to an improper fraction to make it an easier process. Plugging in the number would be: V=3/2^3. This would be translated to 3/2 x 3/2 x 3/2. Multiply them and you'll get 27/8 or 3 3/8.