Use this theorem to find the curvature. r(t) = 2t i + 3 sin(t) j + 3 cos(t) k

Anyone know? will mark brainliest if you're correct!

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 of the following is the explicit rule for a geometric sequence defined a recursive formula of a -5a for which the first term is 23?