Mr liston bought lunch for $ 12.80. he gave the waiter a tip of 15 %. how much money did the waiter recieve? a $1.28 b $ 1.92 c $ 2.56 d $ 3.84

Quick translate "x is 12 units from 20" into an equation. what are the values of x being described? if you can answer any of my other questions that'd be great too

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.

Erin bought christmas cards for $2 each to send to her family and friends. which variable is the dependent variable?