Draw a circle around the ratio that is NOT EQUIVALENT to 6 to 10

1. 9 : 15

2. 3 : 15

3. 18 : 30

4. 5 : 3

i have been struggling all day, please help a sad girl out:)

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