Find the missing side lengths, leave your answers as radicals in simplest form

What is the difference between regular convex and concave polygons

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?

In the geometric progression –3, 12, −48… what term is 3,072?