I would go with A but I am not 100% sure so you may want to check however you can.
H 45%
you would add up the number of shaded squares and divide that by the total number of squares
3x+8
i am pretty sure about that
Answer:
I think the answer is -1 1/2
The radius of the new sphere is 9
The new SA should be 1017.36 in
New volume should be 3052.08in^3