The reflector of a flashlight is in the shape of a parabolic surface. The casting has a

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The reflector of a flashlight is in the shape of a parabolic surface. The casting has a diameter of 4 inches and a depth of 1 inch. How far from the vertex should the light bulb be placed?

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Related Book For  answer-question

College Algebra

ISBN: 9780134453262

7th Edition

Authors: Robert F Blitzer

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