To the nearest tenth, what is the area of a circle whose radius is 2.2 feet? use 3.14 for π . enter your answer in the box.

Is the orthocenter of a triangle on the inside ?

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?

Which two undefined geometric terms always describe figures with no beginning or end?