Um I think it is 2,1 count over 2 then go up1
        
             
        
        
        
Los gramos son más de miligramos
        
             
        
        
        
Answer:
Step-by-step explanation:
From the problem statement, we can setup the following equations:


where  is the current age of Shobos and
 is the current age of Shobos and  is the current age of his mother.
 is the current age of his mother.
Substituting the first equation into the second will allow us to solve for  :
:




Substituting this value into the first equation gives us the age of the mother:



 
        
                    
             
        
        
        
Answer:
Sunil = 10 and Sushil= 40
Step-by-step explanation:
Present ages-
Sushil= 4x
Sunil= x
5 years ago-
Sushil = 4x - 5
Sunil = x - 5
4x - 5 = 7(x - 5) = 4x - 5 = 7x - 35
                         = -5 = 3x - 35
                         = 30 = 3x
                         = 10 = x
So substitute the xs for 10-
Present Sushil= 4 x 10 = 40
Present Sunil= 10
 
        
             
        
        
        
Answer:
The miner would have 3 1/2 of radioactive material in the sample at the beginning of the 7th day.
Step-by-step explanation:
hope this helped!