Question

A tunnel is in the shape of a parabola.The maximum height is 11m and it is 18m wide at the base.What is the vertical clearance 3m from the edge of the tunnel?

Answer 1

so if we create a parabola: y = -x^2 +11 and bend it to -9,0 and 9,0; we can determine the height at x=6

Answer 2

factos are: (x+9)(x-9)

Answer 3

x^2 - 81 +C

Answer 4

when x = 0, this should be 11

im just gonna use my quad program lol

Answer 5

6.1 m