Which sequence is modeled by the graph below?
a. a_n = 2(n - 1)^2
b. a_n = 2 + (2)^(n-1)
c. a_n = 2(2)^(n-1)
d. a_n = (2)(n - 1)

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