What is the minimum number of days per week a person should exercise to improve cardiovascular fitness? one three five ten

Cardiovascular efficiency, muscular strength and endurance, flexibility, and body composition are all related factors.

If the singular term ends in -us, the plural is usually formed by changing the ending to

Astudy shows that an influenza vaccine is 71.4% effective in preventing a particular type of influenza. if 15,422 people receive the vaccine, how many would not be protected and would be likely to get infulenza?