Joel rides bikes in his city There are 4 lengths of race tracks.

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?

The trigonometric ratios sine and secant are reciprocals of each other

Find the commission on a $590.00 sale if the commission is 15%.