PLEASE HELP ASAP, 20+ POINTS ONLY 1 QUESTION!! WRONG ANSWERS GET REPORTED CORRECT, WELL EXPLAINED ANSWERS GET 20 POINTS +BRAINLIEST!
8.08

The height of the tunnel at the center is 54 ft, and the vertical clearance must be 18 ft at a point 8 ft from the center. Find an equation for the ellipse.