What equation can Nina write to show that the distance from any point (, ) on the parabola to the focus is the same as the distance from that point to the directrix?

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answer:  

step-by-step explanation:

here x represents the height of the pole,

and, the height of the shadow of the pole is 12 feet.

also, the angle of elevation from the top of the pole is 40°,

therefore,

by the low of sine,

which is the required equation for finding the value of x,