Write the function g(x) that describes the given transformation on the function f (x)= 3^x Vertical translation down 4 followed by a vertical stretch by a factor of 2

•g(x) = 2 (3)^x -4
•g(x) = 2 (3)^x - 8
•g(x) = 6^x -8
•g(x) = 6^x – 4

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