Using the "Rule of Nines", burns covering the entire head and the lower half of the right arm of an adult would be estimated as covering what percentage of the body?

The "Rule of Nines" is a systematic approach used to estimate the total body surface area (TBSA) affected by burns in adults. According to this rule, the entire head accounts for 9% of the body surface area, while each entire arm accounts for 9%. Since the question specifies burns covering the entire head and the lower half of the right arm, we need to calculate the percentages separately and then sum them.

The head, being fully affected, contributes 9%. For the arm, if we consider the entire arm as 9%, then the lower half would represent half of that percentage. Therefore, the lower half of the right arm would account for 4.5% (which is half of 9%).

Adding these two percentages together: 9% (for the head) + 4.5% (for the lower half of the right arm) equals 13.5%.

This is why the correct answer is the option that represents 13.5%.