Question: Can someone please help me solve the problem below? A flashlight is in the shape of a paraboloid of revolution.The bulb, which is placed at

Can someone please help me solve the problem below?

A flashlight is in the shape of a paraboloid of revolution.The bulb, which is placed at the focus, is 5 centimeters from the vertex.If the depth is to be 10 centimeters, what is the approximate diameter of the flashlight at its opening?

Thank you so much in advance, I appreciate it!

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