Answer:
Since the balls are drawn with replacement, it means the individual probability  remain constant, 
I have solved this problem on paper (Figures Attached). 
Thanks.
 
        
                    
             
        
        
        
Answer:
h = 10 bc 4.7 x 10 = 47
f = 36 bc 6 x 36 = 216
g = 3.5 bc 3.5 + 1.6 = 5.1
unlock number equation = f - g x h or 36 - 3.5 x 10 
unlock number: 1
 
        
                    
             
        
        
        
Answer: X is 15. N is 100
 
        
             
        
        
        
You should set up an X and Y table. Make time X and Distance Y. (the table is like a cross: on the left top put x and left top put y. Then under the line list the x and y numbers given in order.) Then find the "slope" which is y/x  (rise over run) then you get the increase rate of 45 mph. The relation between them would be D=45t