The expression 15r + 15w gives the total time Mario spends exercising. The variables r and w give the number of minutes spent per day running and walking, respectively. Which expression could also be used to find the total time Mario spends exercising ?

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.