Dairon needs 20 pieces of string 3/8 inch in length. he cut a 4 7/8 inch piece of string into pieces that are 3/8 of an inch long each. how many more pieces of string does he need?

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.

286 divided by 457.6 what is the quotient?

Last week , donnell practiced the piano 3 hours longer than marcus . together, marcus and donnell practiced the piano 11 hours . for how many hours did each young man practiced the piano