Let n be a positive integer. In triangle ABC, AB = 3n, AC = 2n + 15, BC = n + 30, and
angle A > angle B > angle C. How many possible values of $n$ are there?

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