HELP ME PLZ I WILL GIVE P THE CROWN THINGY

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?

What is the distance between the points (2, 5) and (5,9)?

Find the arc length of the semicircle. 7the grade