18. the volume and surface area of a sphere with great circle area 36pi in2

20. A sphere has radius 4. If the radius is multiplied by 5, describe what happens to the surface area.

5. a cube with edge length 22 ft

6. a regular hexagonal prism with edge length 10 ft and height 10 ft

7. a cylinder with diameter 16 in. and height 7 in.

Answer:I DON’T KNOW THE ANSWER.