Answer: 26.75 meters.
2πr = 84
2 * 3.14 * radius = 84
radius = 84/6.28
r= 13.375 
So the diameter will be 13.375 + 13.375 which is 26.75 meters.
 
        
             
        
        
        
Answer: Mitochondria
Explanation:
The Mitochondria. 
The mitochondria produces energy for the cell to use by converting chemical energy from food into a form of energy in which is usable to the host cell through a process of oxidative phosphorylation
Although DNA is mainly packaged within chromosones confined in the nucleus, mitochondria also has a small quantity of unique DNA found within them called mitochondrial DNA. DNA found within the mitochondria differs from DNA found within the nucleus in the sense that it can self replicate.
 
        
                    
             
        
        
        
Answer:  mRNA is made in the nucleus
Explanation:
 
        
             
        
        
        
Answer:
I believe it is D.
Explanation:
:)
Please let me know if I am right or wrong.
I hope this helps you!