Answer: 
$5 is the cost of 1 pound of walnuts 
P (Pounds) = 5D (Dollars)
Explanation:
Since 10 pounds of walnuts = $50.
 Let 1 pound of walnuts = Z
then, cross multiply 
So, Z = ($50 X 1 pound) / 10 pounds 
Z = 50/10
Z = $5 
Thus, 1 pound of walnuts will cost 5 Dollars while P (Pounds) = 5D (Dollars) is the equation that shows the relationship between pounds and dollars 
 
        
                    
             
        
        
        
Oral ingestion or swallowing is the
administration method that takes the longest time for the drug to reach the
brain. When using this method, the drug is swallowed through the mouth, moves to
the stomach and then into the bloodstream before it can be transported to the
brain. This means that it takes longer for a swallowed drug to start functioning
than it does with other methods of administration such as injecting.
 
        
             
        
        
        
This is the answer from google!!! hope this helped
 
        
        
        
Leaf area index
The leaf area index (LAI) is the ratio of total projected leaf area per unit ground area, and is widely used to characterize canopy light conditions.
is that clear