18.

If you are 16 years old, what is 65% of your target heart rate?

A.
204

B.
139

C.
133

D.
122

To calculate 65% of your target heart rate at 16 years old, you can use the formula:

Target Heart Rate = 220 - Age

Target Heart Rate = 220 - 16 = 204

So, the answer is A. 204