What is the answer to 30% of 50?

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?

Acircle has a circumference of 28.36 units what is the diameter of the circle

Evaluate the expression. (9 + 5)(3 + 2)0