Addie is j years old. Zach is 3 yrs older than Addie. The sum of their age is s years. Express s in terms of j.
Write a linear equation

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