For her science project, sofia is investigating the relationship between age and the effect of caffeine on heart rate. she assigns the 300 study participants to group a, group b, or group c. each group is given a beverage containing a different level of caffeine, and sofia measures each participant's heart rate before and after he or she consumes the caffeinated beverage. which of the following research methods is sofia
using?

If your teacher tells you to do questions 6 through 19 in your math book for homework, how many questions is that

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.

Your friend uses c=50p to find the total cost, c, for the people, p, entering a local amusement park what is the unit rate and what does it represent in the context of the situation?