Find the mass and center of mass of a wire in the shape of the helix x = t, y = 3 cos(t), z = 3 sin(t), 0 ≤ t ≤ 2π, if the density at any point is equal to the square of the distance from the origin. mass

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