IS A JACKET LIKE THE ONE IN THE PIC AVAILABLE ON AMAZON

The parabola x= √y-9 opens: a.)up b.)down c.)right d.)left

The volume of gas a balloon can hold varies directly as the cube of its radius. imagine a balloon with a radius of 3 inches can hold 81 cubic inches of gas. how many cubic inches of gas must be released to reduce the radius down to 2 inches?

How many sides does a regular polygon have if each exterior angle measure is 45 degrees explain your answer, i really don't understand this.