Answer:
You need to attach a picture or something. 
 
        
             
        
        
        
I think this is the graph for your answer, for the next question like this, try to use "Desmos"
 
        
        
        
Given:
s is inversely proportional to t.
When s = 0.5, t = 7.
To find:
The value of s when t=0.8.
Solution:
s is inversely proportional to t.

 ...(i)
       ...(i)
Where, k is the constant of proportionality.
Putting s=0.5 and t=7, we get



Putting k=3.5 in (i), we get

This is the equation of proportionality.
Putting t=0.8, we get


Therefore, the value of s is 4.375 when t=0.8.
 
        
             
        
        
        
That's 21.
Hope this helps !
Nyway
        
                    
             
        
        
        
Answer:
i really dont know how to do this and i dont think anybody here knows how to
Step-by-step explanation: