For a particular circle, a central angle of 75 degrees will intercept an arc of length 10pi feet. What is the radius of this circle?
lets find the total circumference. 10\pi*4.8= 48\pi
we know the circumference is 2pi*r
so 48pi/2pi=24
r=24
10pi =75 x pi/180 x r(radius), solve for r
10pi = 5/12 pi x r multiply both sides by 12/5 pi
r =12/5 pi x 10 pi
r = 24 - Radius of this circle.
+77 
