Question

My question was denied, but my class is pre-calculus. Question 19, A parabolic question considering conics. 

and (4,-7)
points on the curve
19 The mirror in Carl's flashlight is a paraboloid of revolution. If the mirror is 5 centimeters in
diameter and 2,5 centimeters deep, where should the light bulb be placed so it is at the focus
of the mirror?
20. A parabolic Wi-Fi antenna is constructed by taking a flat sheet of metal and bending it into
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Transcribed Image Text

and (4,-7) points on the curve 19 The mirror in Carl's flashlight is a paraboloid of revolution. If the mirror is 5 centimeters in diameter and 2,5 centimeters deep, where should the light bulb be placed so it is at the focus of the mirror? 20. A parabolic Wi-Fi antenna is constructed by taking a flat sheet of metal and bending it into