Solve.A domed ceiling is a parabolic surface. For the best lighting on the floor, a light source is to be placed at the focus of the surface. If 1 m down from the top of the dome the ceiling is 28 m wide, find the best location for the light source.
A. 196 m down from the top
B. 147 m down from the top
C. 98 m down from the top
D. 49 m down from the top
Answer: D
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G
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thousandths
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