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\( 48.28 \)
Gabriella is designing a flashlight that uses a parabolic reflecting mirror and a light source. The shape of the mirror can be modeled by a parabola that opens upward with a diameter of 4 in. and a depth of 1 in. Where should she place the bulb to ensure a perfect beam of light?
\( (0,1) \)
\( (0,4) \)
\( (1,0) \)
\( (4,0) \)
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