Solve the problem.A reflecting telescope contains a mirror shaped like a paraboloid of revolution. If the mirror is 22 inches across at its opening and is 3 feet deep, where will the light be concentrated?

A. 0.2 inches from the vertex
B. 0.8 inches from the vertex
C. 0.4 inches from the vertex
D. 10.1 inches from the vertex


Answer: B

Mathematics

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A.
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Mathematics