The area of a circle is decreasing at a constant rate of 393 square feet per minute. At the instant when the area of the circle is 64pi square feet, what is the rate of change of the radius? Round your answer to three decimal places.

John bought 5 lemons and used 2 of them for a salad how much did he use for.a salad . he used % of the lemons.

If the slope of one line equals the slope of another line then ? a) the two lines are intersecting lines b) the two lines are perpendicular lines c) the two lines are parallel lines d) the two lines always have very steep slopes

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?