With 15 5/6 lbs of grain stored in the barn, Mrs. Levins will use 3 3/4 lbs to feed the goats. After feeding the horse's, 5 2/3 lbs of grain remains. How many pounds of grain were used to feed the horses?

Robert plans to make a box-and-whisker plot of the following set of data. 27, 14, 46, 38, 32, 18, 21 find the lower quartile, the median, and the upper quartile of the set? lower quartile: 19.5; median: 29.5; upper quartile: 42 lower quartile: 14; median: 27; upper quartile: 46 lower quartile: 18; median: 27; upper quartile: 38 lower quartile: 16; median: 29.5; upper quartile: 42