Answer:
C
90
Step-by-step explanation:
B is likely the center, I think. You can't do it otherwise.
The tangent and a radius of a circle meet at 90o
therefore the answer is 90.
All of this could be confirmed with a diagram.
I dont know sorry
sorrrrrrry
Tim has 90 hardcover books
0.04 is as close as it gets
the area = 36.7