What is the quotient of 11.25 divided by 2.5

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?

Find the measure of the angle indicated in bold

Point m is located at (-4, -6). what is located 4 units from point m? ( its on a coordinate plane by the way. )