Is a eyedropper more than 1 liter less than 1 liter or about 1 liter

Find the measure of the interior angles of the following regular polygons: a triangle, a quadrilateral, a pentagon, an octagon, a decagon, a 30-gon, a 50-gon, and a 100-gon.

Abox holds 500 paperclips. after a week on the teacher's desk 239 paperclips remained. how many paperclips were used?

Hi i’m not sure how to do question 20 if u could explain how to do it that’d b great