Answer:
Step-by-step explanation:
 
        
             
        
        
        
Answer: A .0115
Step-by-step explanation:
There are 1000 mg in a gram. So to convert to grams, you would divide by 1000
 
        
                    
             
        
        
        
Answer:
n < 20
Step-by-step explanation:
2n – 1 < 39
Add 1 to each side 
2n – 1+1 < 39+1
2n < 40
Divide each side by 2
2n/2 < 40/2
n < 20
 
        
             
        
        
        
You have to get r by itself on one side. Multiply both sides by 238 to cancel it out of the denominator on the left side.
You are left with r = 8 × 238 or r = 1904.
To check, plug 1904 back into the equation.
1904 ÷ 238 = 8
8 = 8 (True)
        
             
        
        
        
Im not sure use a caculator with it