The exponents of expression one are the same as the exponents of expression two
        
             
        
        
        
Answer:a b d
Step-by-step explanation:
 
 
        
             
        
        
        
I think it will be neither.
 
        
                    
             
        
        
        
Answer:

Step-by-step explanation:
The half life is the amount of time it takes a substance to decay to half of its original amount.
Since the radioactive substance has a half life of 1000 years, there will be half of it left after 1000 years.
So, the fraction that will be left after 1000 years is 