Please answer the tasks 1-2

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?

Aubrey read 29 books and eli read 52 books what number equals to the number of books aubrey read

The equation sin(25)= 9/c can be used to find the length. what is the length of ab? round to the nearest tenth