Is 1.234 a rational or irrational number

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?

If i have 20$ and i gave 5$ away how much i got

Match the one-to-one functions with their inverse functions.