Answer: D . 
Step-by-step explanation:
Given : Jenny studied the characteristics of two species of bacteria. The number of bacteria of species A, A(t), after t hours is represented by the function, 

 The number of bacteria of species B, B(t), after t hours is represented by the function, 
Then, the difference in the number of bacteria, N(t), of both the species after t hours will be :-

Hence, the correct answer should be : D . 
 
        
             
        
        
        
2194/10000 using prime factorisation method
        
                    
             
        
        
        
Answer:
The mass is greater by 10.502 grams. If you subtract 27.33 from 16.718, you get  10.502. Therefore, the mass of the second coin is greater than the first coin by 10.502 grams.