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Assume that a doctor can earn an additional $20,000 of revenue each year from keeping his office open for one additional hour per week. What must the additional cost of keeping the office open this additional hour per week be to make staying open for the extra hour economically rational?
Blood Groups
are categories of blood based on the presence or absence of certain antigens on the surface of red blood cells, important for blood transfusions.
A,B,O,AB
The four main blood groups in the ABO blood group system, each classified by the presence or absence of certain antigens on the surface of red blood cells.
Rh Factor
A protein found on the surface of red blood cells that can cause immune reactions during blood transfusions or pregnancy.
Marker
An identifiable physical or genetic indicator that can be used for tracking or identification purposes.
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