20 points.
What is the surface area for the sphere below?

Answer: [tex]100\pi\ units^2[/tex]
Step-by-step explanation:
From the given picture, the radius of the given sphere = 5 units
We know that the surface area of a sphere is given by :-
[tex]S.A.=4\pi r^2[/tex]
Therefore, the surface area of the given sphere will be :-
[tex]S.A.=4\pi (5)^2=4\pi(25)=100\pi\ units^2[/tex]
Hence, the surface area for the sphere =[tex]100\pi\ units^2[/tex]