Which is a correct expansion of (2x+3)(2x^{2} -5)?

Look at this pattern ; 1,4,9, number 10000 belongs in this pattern . what’s the place of this number?

White shapes and black shapes are used in a game. some of the shapes are circles. while the rest are squares. the ratio of the number of white shapes to the number of black shapes is 5: 11. the ratio of the number of white cicrles to the number of white squares is 3: 7. the ratio of the number of black circles to the number of black squres is 3: 8. work out what fraction of all the shapes are circles.

How can you find the mean absolute deviation (mad) for this set of data?