SOLUTION: A sound receiving dish used at outdoor sporting events is constructed in the shape of a paraboloid, with its focus 5 inches from the vertex. Determine the width of the dish if the

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Question 1158255: A sound receiving dish used at outdoor sporting events is constructed in the shape of a paraboloid, with its focus 5 inches from the vertex. Determine the width of the dish if the depth is to be 3 feet. (Round your answer to two decimal places.)
Answer by josgarithmetic(39620) About Me  (Show Source):
You can put this solution on YOUR website!
Vertex at origin, parabola concave up.

4py=x%5E2
p is distance from the focus to vertex.

4%2A5y=x%5E2
highlight%2820y=x%5E2%29

Question asks for 2x if y=3.