What is the value of x?

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?

Calculate the missing value. round the answer to on decimal place. start with 70, increase it by 21%, and end up with

Which of the following shows the graph of y=2e^x?