Question

Need help please asap!!!

Answer 1

that is circumfereince times degrees/360
circumfrence=2pir=2pi20=40pi in
degrees=45,
so

sectorlength=40pi times 45/360=1/8 times 40pi=5pi or about 15.707


B is answer

Answer 2

radius (r)= 20= 20central angle (θ)= 45degree = 0.78539816339745radian
If that doesn't make sense your answer is B. 15.7
Hope this helps!