Answer:
a and c I think if I'm wrong I will try again
 
        
                    
             
        
        
        
Answer:
A. Aditi 2 1/2 cups, Kavitha 3 3/4 cups, and Rahul 4 1/8 cups 
Step-by-step explanation:
2*2=4 5-4=1      2 1/2
3*4=12  15-12=3       3 3/4
4*8-32  33-32=1     4 1/8
 
        
             
        
        
        
Answer:
The answer should be 3
Step-by-step explanation:
 
        
                    
             
        
        
        
After the first three days, the sample size will be half of the initial; therefore, 400g/2= 200g. However, it is asking how long will it take to decay to 100g, so we will take 200g/2= 100g, which will take another three days.  It will take 2 half-lives, which will encompass 6 days.