Which model represents the intermediate step between glycolysis and the citric acid cycle?
Model
Pyruvic acid
Pyruvic acid
02
CO2
CO2
02
Acetyl-CoA
Acetyl-CoA
Model A
Model B

answer: 4  

the square root of 16 is 4. it is a very simple mathematic concept. a square root when a number multiplied by itself will result in a number. here, the number 16 comes when 4 is multiplied by 4. hence the square root of 16 is 4. you can always figure out a square root by the inverse operation of squaring.  

whats the rest of it?

the answer is 15 to your question