Answer:
Below
Explanation:
F(x)=1/12x^2+2x for this quadratic , max value will occur at x= -b/2a
= - 2 / (2* 1/12) = -12
Plug in -12 to find the max height
1/12 (-12)^2 + 2 * -12 = -12 ft
I think you have messed up the equation? maybe 1/2 x^2 rather than 1/12 x^2 ???