X+1/x is the plynomial of how many degrees

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?

If the simple annual interest rate on a loan is 6, what is the interest rate in percentage per month?

The cost of using a service is $0.25 per min. what equation correctly represents the total cost c, in dollars, for d days of use?