Can someone help me with this please!

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

The volume of a sphere is increased by 6%. calculate the corresponding percentage increased in it area.

Select the graph of the solution. click until the correct graph appears. |x| = 3