In a group of 21 students, 8 students take art courses, 7 students take music courses. two students take both courses. a student is chosen randomly from this group. what is the probability that the student takes both art or music courses? 13/21 8/21 2/7 5/7

In the geometric progression –3, 12, −48… what term is 3,072?

The scatterplot below shows the number of hours that students read weekly and the number of hours that they spend on chores weekly. which statement about the scatterplot is true?

Brittany has designed four different birdcages, each with the same volume: a square pyramid, a cylinder, a cone, and a sphere. the zoo wants to use one of brittany’s designs but plans to change the volume of the cage. find the design change that would result in the birdcage with the greatest volume. a.) increase the area of the base of the square pyramid by a factor of ten. b.) increase the height of the cylinder by a factor of ten. c.) increase the radius of the cone by a factor of ten. d.) increase the radius of a sphere by a factor of ten.