An arithmetic sequence has this recursive formula: (a=7
1er = 8-1-4
What is the explicit formula for this sequence?
O A. an = 7 + (n - 4)(-1)
B. an=-4+(n-1)7
O C. an = 7+ (n-1)(-4)
D. a, = (-1) + (n - 7)(-4)

In the diagram, be and ad pass throughthe center of circle o, and the area ofsector aoc is 47.45 square units. what isthe area of sector boc? use the value =3.14, and round your answer to two decimalplaces.22.33 square units25.12 square units