A mirror is shaped like a paraboloid of revolution and will be used to concentrate the rays

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A mirror is shaped like a paraboloid of revolution and will be used to concentrate the rays of the sun at its focus, creating a heat source. See the figure. If the mirror is 20 feet across at its opening and is 6 feet deep, where will the heat source be concentrated? 

Sun's rays 20 6'

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Precalculus

ISBN: 978-0321716835

9th edition

Authors: Michael Sullivan

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