Steven eats 5 1/8 ounces of chocolate bar weighing a total of 15 5/8 ounces. How much of the chocolate bar is still left?

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