Answer:
The answer is age.
Explanation:
So for a 50-year-old, maximum heart rate is 220 minus 50, or 170 beats per minute.At a 50 percent exertion level, your target would be 50 percent of that maximum, or 85 beats per minute.
Continuing education is required and is available from a number of different sources
I think that drugs and their affects would be interesting to learn about, because its a big issue in our world today, and it's good to learn about these things (such as drugs/alcohol)
He could maybe raise money by doing a fundraiser and then when he reaches his goal he could donate it
Eliminated from the body as wastes
