a laboratory technician is developing cleaning solution that will remove stains from clothes. the technician mixes a 20% acid solution with a 5% acid solution. how much of each solution to the nearest millimeter is needed to make 150 milliliters of a 15% acid solution. Set up a system of equation for the given situation. You do not need to solve these.

What is the difference between the predicted value and the actual value

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.

Molly shared a spool of ribbon with 12 people. each person received 3 feet of ribbon. which equation can she use to find r, the number of feet of ribbon that her spool originally had?