Element X decays radioactively with a half life of 11 minutes. If there are 820 grams of Element X, how long, to the nearest tenth of a minute, would it take the element to decay to 18 grams? y = a(0.5)^ t/h

What is the distance between the points (2 -3) and (-6 4) on the coordinate plane

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?

Bradley hikes 12 miles in 3 hours. in relation to bradley’s hike, which statement describes the expression