I honestly don’t understand
        
             
        
        
        
Answer: There are 20 boys
Step-by-step explanation:
 
        
                    
             
        
        
        
Answer: i think its either 3:5 or 1:3 or there just not similar
Step-by-step explanation: 
 
        
             
        
        
        
We can write and solve the differential equation that fits the statement given;
 dy/dt = k(50-t)
∫dy = ∫ k(50-t)dt
= ∫ (50k - kt) dt
therefore;
y = 50kt - k/2(t²) + C
Alternatively, can be written as
  y = - k/2 (50-t)² + C)