Answer:
I believe that it should be 36.
Step-by-step explanation:
You got that the equation is 1/4 s^2, which I agree with. So plugging in 12, in place of s, you get:
[tex]\frac{1}{4} * 12^{2}[/tex]
[tex]\frac{1}{4} * 144[/tex]
[tex]144/4 = 36[/tex]
