Please someone help please

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

At a book fair, joe bought 24 books at 3 for $5 and had $2 left. how much money did he have at first?

Polygon abcd is a rectangle what is the area