The radius of a sphere is 13 cm. Which is the volume of the sphere to the nearest tenth?

Use the elimination method to find the solution to the system of equations. 2x - 3y = -9 -x + 3y = 6

Researchers were interested in whether relaxation training decreases the number of headaches a person experiences. they randomly assigned 20 participants to a control group or a relaxation training group and noted the change in number of headaches each group reported from the week before training to the week after training. which statistical analysis should be performed to answer the researchers' question?

What is the ratio for the surface areas of the cones shown below, given that they are similar and that the ratio of their radil and altitudes is 4: 3? 23