SOLUTION: a flashlight is shape like a paraboloid, so that if its light bulb will then bounce off the surface in a focused direction that is parallel to axis. if the paraboloid ha depth of 1

Algebra ->  Quadratic-relations-and-conic-sections -> SOLUTION: a flashlight is shape like a paraboloid, so that if its light bulb will then bounce off the surface in a focused direction that is parallel to axis. if the paraboloid ha depth of 1      Log On


   

Question 1119260: a flashlight is shape like a paraboloid, so that if its light bulb will then bounce off the surface in a focused direction that is parallel to axis. if the paraboloid ha depth of 1.8 in and the diameter on its surface is 6 in, how far should the light source be placed from the vertex?
Answer by ikleyn(52800) About Me  (Show Source):
You can put this solution on YOUR website!
.
See the lesson
    - Practical problems from the archive related to ellipses and parabolas,   Problem 2
in this site,  where similar problem was solved.


Consider it as your sample.   Read it attentively.


Then substitute your data and find the answer.


In this way,  you will learn on how to solve such problems.