Answer:
B) 4 pi
Step-by-step explanation:
The arc is the circumference.
C = 2*pi*r
C = 2*pi *18
C = 36pi
A circle is 360 degrees. The are is covering 40 degrees
40/360 = 1/9
The arc is 1/9 of the circle, so it will be 1/9 of the circumference
1/9 C = 1/9 (36 pi)
arc = 4 pi
