(a) Which unit(s) could be used for the unit of measurement? Check all that apply.
kilograms
seconds
milligrams
grams
minutes
(b) Which of the procedures below would be the best way to find the average time?Randomly pick 55 students to run a lap around the track and measure their times.Randomly pick 55 students to run a lap around the track and have them state their own times.Ask for 55 volunteers to run a lap around the track and have them state their own times.Measure the times of 55 volunteers who run a lap around the track.