Answer:
Step-by-step explanation:
The equation given is a parabola that uses the x-axis as time and y-axis as height.
Thus, the x-coordinate of the vertex (time) of the parabola in the form ax^2 + bx + c
can be found using the formula:-b/2a
Thus,
-b/2a= -36/2(-12) = -36/-24 = 3/2 or 1.5 seconds
