Ralph bought 3 boxes with 20 pencils each and 4 boxes with 10 pens each. to find the total number of pencils and pens, ralph evaluated 3×20+4x10=720. is his answer reasonable? explain.

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