Each term is double the one before it, so the appropriate choice is ...
... D. f(x+1) = 2f(x)
Answer:
What you are doing wrong is that you are using the formula to find the area of the entire circle rather than using the formula to find a sector of a circle. The two cases uses 2 different kind sentences of formulas.
I do know the bottom one is 2.8
Top is 1.6
I don’t know the middle one
Weird. I think you just need to look if the point falls on the shaded area. But only (-5,5) does ...