Apollo 8 orbited the moon in a circular orbit. its average altitude was 185 km above the moon's surface. create an equation to model the path of apollo 8 using the center of the moon as the origin. note that the radius of the moon is 1,737 km. a. x^2+y^2=34,225 b. x^2+y^2=2,408,704 c. x^2+y^2=3,017,169 d. x^2+y^2=3,694,084