How do you solve 216 - 202? ? -explained-

The perimeter of a movie screen is 54 meters. the screen is 18 meters wide. how tall is it?

An ulcer medication has 300 milligrams in 2 tablets. how many milligrams are in 3 tablets?

Aprobability experiment is conducted in which the sample space of the experiment is s={7,8,9,10,11,12,13,14,15,16,17,18}, event f={7,8,9,10,11,12}, and event g={11,12,13,14}. assume that each outcome is equally likely. list the outcomes in f or g. find p(f or g) by counting the number of outcomes in f or g. determine p(f or g) using the general addition rule.