I am prettu sure that this statement : According to the American Heart Association, one out of every three men in the U.S. will have some sort of heart disease expresses <span>inference as you can see the result of particular research/ survey etc which states as its conclusion. (pay attention to word 'according')</span>
naturally occurring compounds, which form the differentiating component of nucleotides; five bases occur in nature, three of which are common to RNA and DNA
If one day has 24 hours, you'll need 12 tablets a day. There are 7 days so multiply 12 by 7 to get 84 tablets in 7 days.
I believe heart and lungs are strengthened by cardiovascular exercise.