10 sin 62 Question 13(Multiple Choice Worth 1 points) (04.04 MC) 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 its focus is 20 ft 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 the halfpipe? (0, 20); y= x2 + 20 80 O (0, 20); y =x2 -20 O (0, 10); y = 40 1 x2 + 10 (0, 10): y= 40 1X2 -10