41.=30°
43.=60°
45.=60°
47.=30°
Answer:
Arc length is 
Step-by-step explanation:
We have,
Central angle is 15 degrees and the radius of the circle measures 9 inches.
It is required to find the arc length of the sector.
The relation between arc length and the central angle is given by :

Circumference, 


Hence, the correct option is (b).
When you rearrange the equation, you find that the solution is b)