Which of the following shows figure T rotated 90 degree clockwise around the origin?

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?

Which compound inequality could be represented by the graph?

What is the radius of a circle with an area of 78.5 cubic inches? use 3.14 for pie