an ice cream cone consists of a sphere of vanilla ice cream and a right circular cone that has the same diameter as the sphere. if the ice cream melts, it will exactly fill the cone. assume that the melted ice cream occupies 75% of the volume of the frozen ice cream. what is the ratio of the cone's height to its to radius? (note: a cone with radius r and height h has volume 7r 2h /3 and a sphere with radius r has volume 47r 3/3.)