Sanvi hikes 5 2/10 kilometers one weekend the next weekend she hikes 9/10 kilometers more than the week before

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?

What is the interquartile range of this data set? 2, 5, 9, 11, 18, 30, 42, 48, 55, 73, 81

Find the condition that the zeros of the polynomial f(x) = x^3+3px^2+3px+r may be in a.p.