CAN SOMEONE TELL ME WITCH ONE TO PICK PLEASE

Suppose the radius of a circle is 16. what issuppose the radius of a circle is 16. what is its circumference its circumference

If 24 people have the flu out of 360 people, how many would have the flu out of 900. choose many ways you could use proportion that david would use to solve this problem

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?