Andy has two similar conical hats, hat a and hat b. the diameter of hat a is 18 inches, and the diameter of hat b is 9 inches. what is the ratio of the volume of hat a to the volume of hat b?

2: 1
16: 1
4: 1
8: 1

im am fairly sure that it is not 4: 1, but that's all i know.

answer: do we write it

step-by-step explanation:

the formula for the equation of a circle is (x – h)2+ (y – k)2 = r2, where (h, k) represents the coordinates of the center of the circle, and r represents the radius of the circle. if a circle is tangent to the x-axis at (3,0), this means it touches the x-axis at that point.