Answer:
Arc length s = 15.3 inches
Step-by-step explanation:
We know that length of an arc that subtends an angle θ radians at the center is given by

where
r is the radius of the circle
θ is the angle subtended in radians
Thus applying values we get 
thus s = 15.3 inches
3) 3(8b + 3)
4) 57
I’m pretty sure that this is the answer
That is a 30 60 90 triangle.
Read about those here: http://www.1728.org/trig2.htm
2876 Rounds To 3000
513 Rounds To 500
18 Rounds To 20
Then multiply:
3000x500x20= 30,000,000
Hope i helped :)