Question 465772
This depends on what the 8 represents: diameter? radius? circumference?

I'm going to assume that it represents the radius.  If it's something else, fill in what you'd need.

Arc length is part of the distance around a circle.  We're going to find the circumference ( {{{ 2*pi*r }}} ), then multiply the fraction of the circle that we want.  Since you want 110 degrees and there are 360 degrees in a circle, the fraction we want is {{{ 110/360 }}}.

{{{(2*pi*8)*(110/360) = 15.36}}}