Answer:A
Step-by-step explanation: 6 divided by 420 = 70
 
        
             
        
        
        
Answer:
B 
Step-by-step explanation:
Here, we want to choose the equation representing the time it will take if they worked together 
Let the amount of tasks to be done be t
pedro will work at a rate of t/3
Camela will take t/2 
So the joint rate will be 
t/2 + t/3 
This joint rate will be equal to 1
Thus, we have 
t/2 + t/3 = 1