24 squared + 10 squared = x squared

For the rule of 78, for a 12-month period, the last term in the sequence is 12 and the series sums to 78. for an 10 month period, the last term is and the series sum is . for a 15 month period, the last term is and the series sum is . for a 20 month period, the last term is and the series sum is

What is coefficient of the term of degree of degree 5 in the polynomial below

What is the interquartile range (iqr) of the data set represented by this box plot?