Rounded to the nearest tenth, what is the maximum height of the road, in feet?

42

step-by-step explanation:

256/6=42

look at the picture.

y-intercept for the function on a picture is 4 → point (0, 4).

y-intercept for the function

is for x = 0. substitute:

y-intercept is 8 → point (0, 8).