Arock climber's elevation above sea level changed −82 1/2 feet in 2 1/4 minutes as she descended. what was the climber's average change in elevation per minute?

The table shows the distance traveled over time while traveling at a constant speed.

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

Ijust need to see how to do this. so you don’t have to answer all of them just a step by step explanation of one.