Points) (01.02 MC) Which of the following correctly simplifies the 22.6° expression 9 2 2.1 :) 32 343 2.0 26.0 26 7 2:1) 26.1 73 2.0 - 0 7 PLZZZ HELP

News cameras take an overhead picture of a crowd at an outdoor event journalist then count the total number of people in the picture and use the sample of estimate the total number of people in the crowd this process is an example of

Factor this polynomial completely x^2-64

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?