When revenue is closed

1. what is the formula for finding the vertical distance between two points on a coordinate plane?

The number if marbles of different colors stored in a hat is listed below: 4 red marbles 10 green marbles 7 blue marbles. without looking in the hat, dan takes out a marble at random. he replaces the marble and then takes out another marble from the hat. what is the probability that dan takes out a blue marble in both draws?

Solve the inequaliy: (x^2+2)(x−2)^2(6−2x)> 0