How do you find the percent of increase from 12 to 18?

At the newest animated movie, for every 9 children, there are 4 adults. there are a total of 39 children and adults at the movie.

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?

The function models the number of accidents