Answer:
A
Step-by-step explanation:
The surface area (A) of a sphere is calculated as
A = 4πr² ← r is the radius
here r = 2, hence
A = 4π × 2² = 4π × 4 = 16π units² → A
It is 5 since u need to jump 5 times 4,8,12,16,20=5 times 4
So n=8 and those are all the steps
Because x²+1 has an imaginary solution so you can’t find a value to put on the side for synthetic division
