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Approximately 74 percent of adults in the United States are overweight. BMI
is known as body mass index and it is calculated by
BMI= weight/height
BMI = kg/m²
Body mass index helps to determine if a person is overweight or
underweight. Being over weight means having a BMI of 25-29.9 while
having below 18.5 means being underweight.
Recent studies have however shown that approximately 74 percent of adults
have a BMI of greater than 25 which means they are overweight.
Read more on brainly.com/question/10091149
Answer: C. the first heart sound.
Explanation:
The valves open and close due to undue pressure difference of blood across these valves. The AV or atrioventricular valve separates the atrium from the ventricles on each half of the heart.
The closure of the AV valve will result in the production of the first sound of the heart. The AV valve prevent the back flow of blood to the atria.