The floor exercise mat measures 40 feet by 40 feet. find the measure of the diagonal using the formula c² =a²+b²
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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?

An ulcer medication has 300 milligrams in 2 tablets. how many milligrams are in 3 tablets?

Kevin's bank offered him a 4.5% interest rate for his mortgage. if he purchases 3 points, what will be his new rate?