Answer:
what missing information
Step-by-step explanation:
 
        
             
        
        
        
Answer:
21 
Step-by-step explanation:
 
        
                    
             
        
        
        
d1 = 51(t)
d2 = 71(8 - t)
d1 + d2 = 508
and now you just have to solve for t.
 
        
             
        
        
        
Sometimes when you’re doing math, it’s easier to line your numbers up when you have your ratio as a decimal! Hope it helped