What is the surface area of a sphere with a radius of 9 units?
OA. 576 units2
OB. 648n units
OC. 288T units
OD. 324 units
m
![What is the surface area of a sphere with a radius of 9 units OA 576 units2 OB 648n units OC 288T units OD 324 units m class=](https://us-static.z-dn.net/files/d69/8b16ee1faece495f8959dfe15ddbdd1e.png)