A hiker is standing on the ground looking up to the top of a tree with an angle of elevation of °= 55 The situation represented where the base of the triangle is the eye level of the hiker and the vertical side is the tree. The distance from the hiker's eye to the top of the tree is 54 feet. Based on the information given, what is the distance a, in feet from the hiker
to the base of the tree? Do not include the units in your answer. Round to the nearest whole number.

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?

What is the number 321,000,000 in scientific notation? also what is the number? ?

Me max recorded the heights of 500 male humans. he found that the heights were normally distributed around a mean of 177 centimeters. which statements about max’s data must be true? a) the median of max’s data is 250 b) more than half of the data points max recorded were 177 centimeters. c) a data point chosen at random is as likely to be above the mean as it is to be below the mean. d) every height within three standard deviations of the mean is equally likely to be chosen if a data point is selected at random.