The axis of the sphere below is 14 units in length. What is the surface area of the sphere? A. 256pi units^2 B. 72pi units^2 C. 196pi units^2 D. Cannot be determined
The axis is just another word for the diameter. Therefore the diameter is 14 units, meaning the radius is 7 units.
Now you can use the formula \(\text{surface area} = 4\pi (\text{radius})^2\) to finish it off.
