1. Simplify 2log38 - 3log32

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

Which of the following is the result of expanding

True or false? a circle could be circumscribed about the quadrilateral below.