Answer:
9
Step-by-step explanation:
The answer is A because if you do the 40 dagree and a coodinate plane it forms a triangle.
So check the picture below
if we check the solutions or zeros for the equation, we get

and as you can see in the picture, the value of "x" when y = 3.5, or the height of the truck is

the truck, ends up with a clearance of

on either side, so, the maximum clearance, the truck can have, those two clearances added together,