Question

HELP ASAP!

What is the length of the indicated arc?

A) 2 pi

B) 4 pi

C) 9 pi

D) 18 pi

E) None of the above

Answer 1

b) is the answer to that question

Answer 2

B) 4 pi

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