Posted by lindsey on Tuesday, December 20, 2011 at 8:19pm.
The cross section of a television antenna dish is a parabola. A dish has a receiver that is located at the focus, 4 ft. above the vertex.
Find the equation. (which I did)  x^2 = 8y
If the dish is 8 feet wide, how deep is it?

trig  Damon, Tuesday, December 20, 2011 at 8:28pm
so x = +/ 4 if 8 wide
what is y ?
16 = 8 y
y = 2

trig  lindsey, Tuesday, December 20, 2011 at 8:30pm
Wow. Do I just substitute x with 8, and then solve to get y=5?

trig  Lindsey, Tuesday, December 20, 2011 at 8:30pm
Oops nevermind, sorry.

trig  Damon, Tuesday, December 20, 2011 at 8:32pm
No, x is half the width.
Answer This Question
Related Questions
 Algebra  An engineer designs a satellite dish with a parabolic cross section. ...
 Algebra  An engineer designs a satellite dish with a parabolic cross section. ...
 Please Help!!!!!!  an engineer designs a satellite dish with a parabolic cross...
 Math, Please Help!!!  an engineer designs a satellite dish with a parabolic ...
 algebra  A satellite dish has a parabolic cross section and is 6 ft deep. The ...
 Math story problem  A satellite dish is shaped like a paraboloid of revolution...
 Algebra  The reflecting dish of a parabolic microphone has a crosssection in ...
 math  Satellite dish antennas have the shape of a parabola. Consider a ...
 physics please help!!  A satellite dish is designed to pick up radio waves from...
 Math  A satellite dish has a diameter of 32 inches and is 6 inches deep. If the...
More Related Questions