Given:
a.) A sphere with a radius of 3.
For a sphere, will be using the following formula for its surface area:
[tex]\text{ Surface Area = }4\pi r^2[/tex]Where,
r = radius of the sphere
We get,
[tex]\text{ Surface Area = }4\pi r^2[/tex][tex]\text{ = 4(3.14)(3)}^2[/tex][tex]\text{ = 4(3.14)(9)}[/tex][tex]undefined[/tex]