Question

In a circle with a 8 in radius, how long, in inches, is an arc associated with 2.6 radians.

Answer 1

S = r·α is the formula to find the arc length (s), given the radius (r), and angle measure (α) in radians.
If the angle measure is NOT given in radians you must convert to radians.

s = 8 · 2.6
s = 20.8 in