Answer:
33993.0768
Step-by-step explanation:
You can multiply the number of bacteria by (0.2^4). The 0.2 is for the 20% that  left after each day. The (^4) is for the 4 days that have passed.
 
        
             
        
        
        
-1, -1 I think is the answer
        
             
        
        
        
Answer:

Step-by-step explanation:
1) Remove parentheses.

2) Regroup terms.
