A parabolic reflector is 9 cm deep and it's Diameter is 24 cm how far is its focus from - Maths - Conic Sections

Question

A parabolic reflector is 9 cm deep and it's Diameter is 24 cm how
far is its focus from the vertex??
DO THIS PLEASE FAST ???? I HAVE NOT RECIEVE MY ANSWERS OF THE OTHER
QUESTIONS TILL NOW CAN YOU PLEASE HELP ME FAST ????

...... __ · Answer

l hope, it will help you
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A parabolic reflector is 9 cm deep. and it's Diameter is 24 cm how far is its focus from the vertex?? DO THIS PLEASE FAST ???? I HAVE NOT RECIEVE MY ANSWERS OF THE OTHER QUESTIONS TILL NOW CAN YOU PLEASE HELP ME FAST ????

A parabolic reflector is 9 cm deep. and it's Diameter is 24 cm how far is its focus from the vertex??
DO THIS PLEASE FAST ???? I HAVE NOT RECIEVE MY ANSWERS OF THE OTHER QUESTIONS TILL NOW CAN YOU PLEASE HELP ME FAST ????