The answer would be 82 millimeters!
        
             
        
        
        
I believe it is 4/12 since you have a total of 12 marbles and only 4 are red plastic ones
        
             
        
        
        
For this case we have:
If after 2 hours the marathon runner has traveled 22 kilometers we have:
2h -----------> 22km
Applying a rule of three, we can know the time it takes to run 42km. So, we have:
2h -----------> 22km
x -------------> 42km
Where "x" is the time it takes to travel 42km. Resolving we have:




Thus, after 3.82 hours the marathon runner will travel 42km.
Answer:
3.82 hours
 
        
             
        
        
        
First answer: 160
Second answer: 300
        
             
        
        
        
Answer:
17 is the answer
Step-by-step explanation: