GIVING MEDALS AND FANS!REALLY NEED HELPPP,PLZ!!!!

A tunnel is in the shape of a parabola. The maximum height is 16 m and it is 16 m wide at the base as shown below.
What is the vertical clearance 7 m from the edge of the tunnel?

Question

GIVING MEDALS AND FANS!REALLY NEED HELPPP,PLZ!!!!

A tunnel is in the shape of a parabola. The maximum height is 16 m and it is 16 m wide at the base as shown below.
What is the vertical clearance 7 m from the edge of the tunnel?

mayaal · Answer

can u help me mr.radar?

mayaal · Answer

@Ash90   can u help me with this question,plz?

anonymous · Answer

okay 
center is 1,-3
a=4 b=2
(x-1)^2/16+(y+3)^2/4=1

mayaal · Answer

isnt the center at the origin,thats what the pic says?

anonymous · Answer

and you  should get 15.7 m

radar · Answer

Make a drawing, mine looks like this.|dw:1415743411367:dw|
Note that the vertex is at (0,16) please ignore the (0,8---change the 8 to a 16)
Use the vertex form equation for a parabola, you have two points you can use, (8,0)
and (-8,0).   Solve for y when x is 1, or 7 meters away from the edge.