Who knows how to do this Either enter an exact answer in terms of \piπpi or use 3.143.143, point, 14 for \piπpi.

units^3
3

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

Asphere has a diameter of 10 in. what is the volume of the sphere?

How do i simply this expression (quadratic formula basis) on a ti-84 or normal calculator?