Question number 5 part A and B

Name each raycalculation tip: in ray "ab", a is the endpoint of the ray.

Solve 13 + w/7= -18 (w/7 is a fraction)

Acentral angle measuring 160 degrees intercepts an arc in a circle whose radius is 4. what is the length of the arc the circle formed by this central angle? round the length of the arc to the nearest hundredth of a unit. a) 4.19 units b) 6.28 units c) 12.57 units d) 12.57 square units