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.
9
2x=28-10
2x=18
x=18÷2
x=9
8
f(1)=7(1-1)+8
f(1)=7(0)+8
f(1)=0+8
f(1)=8
