6, 6, 6, 7, 10, 11, 12, 13, 14, 14, 14, 15, 16, 18, 18 Calculate the Mean Absolute Deviation (MAD) of the data set (Round off to the nearest tenth)

What is the sum of the geometric series in which a1 = 7, r = 3, and an = 1,701? hint: cap s sub n equals start fraction a sub one left parenthesis one minus r to the power of n end power right parenthesis over one minus r end fraction comma r ≠ 1, where a1 is the first term and r is the common ratio