40% of the problems is 32 problems.

What is the value of this expression when b= 5 6 (2b-4)

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 the region that is inside r=3cos(theta) and outside r=2-cos(theta). sketch the curves.