Help with what? I need more information
        
             
        
        
        
Answer:
= 8.9 units 
Step-by-step explanation:
When a chord intersects with a tangent outside a circle then we use the relationship;
X ² = AO × BO, Where A and are the points of intersection of the chord an the circle, while O is the point of intersection between the chord and the tangent.
Therefore;
x² = 4 × 20 or 8 × 10 
x² = 80 
x = √80
  = 8.944
  ≈ 8.9 
 
        
             
        
        
        
Would it be a ratio, if it is it would most practically be 10:40 and if in simplest form it would be 1:4 or just you photo math
 
        
             
        
        
        
i not good at ratio but the answer (not in ratio table) is 4 i think if not sorry! i did this in my head and i have a head ace how sorry i am sorry sorry sorry i hope you pass this question! <em>sorry so sorry!</em>