Which is used to find the number of ways a given number of objects can be ordered? need asap im between factorial and combination atm

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.

Suppose m: angle a =77 degrees what is the measure of a complement of a complement of angle a, what is a conclusion you can draw about a complement of a complement of an angle

Adie is rolled, what is the probability of getting an even number or a 3? write the solution too