SOLUTION: a parkway 80 ft. wide is spanned by a parabolic arc 100 ft. long along the horizontal, if the parkway is in the center, how high must the vertex of the arch be in order to give a m

Question 1005396: a parkway 80 ft. wide is spanned by a parabolic arc 100 ft. long along the horizontal, if the parkway is in the center, how high must the vertex of the arch be in order to give a minimum clearance of 20 over the parkway?
Answer by KMST(5328) (Show Source): You can put this solution on YOUR website!
The parabola needed, drawn over a conveniently placed set of axes, with all measures in feet, looks like this:
The equation will be such that .
--->--->--->
The height at the vertex (in feet) is .
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