Solved: The reflective surface in a flashlight has a parabolic shape with a cross
Chapter 10, Problem 21(choose chapter or problem)
The reflective surface in a flashlight has a parabolic shape with a cross section that can be modeled by y = _1 3 x2, where x and y are in centimeters. How far from the vertex should the filament of the light bulb be located?
Unfortunately, we don't have that question answered yet. But you can get it answered in just 5 hours by Logging in or Becoming a subscriber.
Becoming a subscriber
Or look for another answer