Answer:
Step-by-step explanation:
Area of sector = angle/360 * pi * r^2
5.5pi = angle/360 * pi * 9
5.5 = angle/360 * 9
angle = (5.5 * 360)/9 = 40 * 5.5 = 220
Answer:
9
Step-by-step explanation:

The answer is D and it's pretty simple to do:
Answer:
p(x) = A(x - 4i)(x + 4i)(x - 3)(x + 3), with A = 1.
it matches