Simplify. Multiply and remove all perfect squares from inside the square roots.
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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

Two variables, x and y, vary inversely, and x=12 when y=4. what is the value of y when x=3?