Measures of Center and Variability

What is the solution to the equation? k/6.4=8.7 2.3 5.568 15.1 55.68

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

How is the interquartile range calculated?