Solve the Problem $20 \%$ Alcohol Solution Must Be Mixed with 90 Liters of A Alcohol

question 64

Multiple Choice

Solve the problem.
-How many liters of a $20 \%$ alcohol solution must be mixed with 90 liters of a $80 \%$ solution to get a $40 \%$ solution?

• A) \(27 \mathrm {~L}\)
• B) \(18 \mathrm {~L}\)
• C) \(180 \mathrm {~L}\)
• D) \(270 \mathrm {~L}\)

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Definitions:

Epicardium

The outermost layer of the heart wall, also known as visceral pericardium, which provides lubrication and protection to the heart.

Endocardium

The innermost layer of tissue that lines the chambers and valves of the heart, providing protection and contributing to heart function.

Bicuspid Valve

Also known as the mitral valve, it is a heart valve that controls the flow of blood between the left atrium and the left ventricle.

Pulmonary Semilunar Valve

A valve located between the right ventricle and the pulmonary artery that prevents blood from flowing back into the heart chamber after it has been pumped out.