how do you solve this problem?

Answer: 6pi/5
Step-by-step explanation:
To get 6pi/5
You need to convert the angle into radians and you do this by multiplying it by pi/180
So it looks as follows:
24 * pi/180
I used a TI-89 and it gave me 2pi/15
Next we use the arc length formula which is:
Radius * central angle (this MUST be in radians)
So, the radius is 9 and now we know that the central angle is 2pi/15 we simply multiply them together:
9*2pi/15 to get 6pi/5