Question: Please help me solve this. A skateboard halfpipe is being designed for a competition. The halfpipe will be in the shape of a parabola and

Please help me solve this. A skateboard halfpipe is being designed for a competition. The halfpipe will be in the shape of a parabola and will be positioned above the ground such that is focus is 30ft Above the ground. Using the ground as the x-axis, where should the base of the halfpipe be positioned? Which equation best describes the equation of a half pipe?

(0,60); y=1/240 x^2-60

(0,60); y= 1/240x^2+60

(0,15); y=1/60x^2-15

(0,15); y=1/60x^2+15

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