trig
posted by Scott .
find, to the nearest tenth of an inch, the length of the arc intercepted by a central angle of (4pi)/3 radians if a radius of the circle is 22 inches long

C = 3.14D = 3.14(2*22) = 138.16 in. =
Circumference of circle.
L = 4pi/3*1/2pi * 138.16 = 92.1 in. =
Lengh of arc.