Homework Help: Math

Posted by Gabby on Thursday, April 12, 2012 at 3:02am.

In a factory, a parabolic mirror to be used in a searchlight was placed on the floor. It measured 40 centimeters tall and 90 centimeters wide. Find the equation of the parabola.

I tried working this problem out and I got y=-8/405x^2+40, but I'm not sure if it is right. Could someone please help me?

Math - Steve, Thursday, April 12, 2012 at 11:07am
draw a picture of the parabola, centered over (0,0)

vertex: (0,40)
x-intercepts: x = 45, -45

y = (45^2 - x^2) * 40/45^2

you can pretty it up if you want.
Math - Allie, Thursday, April 12, 2012 at 5:00pm
Is my answer correct then??

Answer this Question

Related Questions

math - consider a 2D mirror has a parabolic profile of y = (x-3)^2 + 5 facing ...
math - please help me to solve this assignment : consider a 2D mirror has a ...
Physics - You are 1.9 m tall and stand 3.3 m from a plane mirror that extends ...
physics - A 4.5 cm tall object is placed 20 cm in front of a spherical mirror. ...
physics - PLEASE HELP - A person whose eyes are H = 1.62 m above the floor ...
physics - A person stands 4.4 m in front of a wall that is covered floor-to-...
Physics - A candle is placed 17.0 cm in front of a convex mirror. When the ...
physics --- - A concave spherical mirror has a radius of curvature 15 cm. A 1 cm...
physics - A concave spherical mirror has a radius of curvature 15 cm. A 1 cm ...
Physics - If a 2 m tall man is looking at a plane mirror from an eye which is 20...

For Further Reading

First Name:
School Subject:
Answer: