QUICK! recursive sequence

The radius of the earth is two times the radius of the moon. what fraction of the volume of the earth is the volume of the moon?

Find the solution to this system 2,1 1,-2 1,2 -1,2

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