Find the surface area

Ben bowled 124 and 188 in his first two games. what must he bowl in his third game to have an average of at least 160?

Aclass consists of 55% boys and 45% girls. it is observed that 25% of the class are boys and scored an a on the test, and 35% of the class are girls and scored an a on the test. if a student is chosen at random and is found to be a girl, the probability that the student scored an ais

Which expression gives you the distance between the points (5,1)and(9,-6)