Is the following shape a rectangle? How do you know?

What is the value of x in the following equation. -x ^3/2 = -27

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?

Find the area of a parallelogram with base 15 yards and height 21 2/3