Answer:
534 is the mean. 
Step-by-step explanation:
 to calculate the mean you add all the numbers together (for example this set of numbers):
785, 585, 465, 409, 495, 465 
=3204 
then divide the number of numbers that you added together , (in this case 6) 
3204/6 
=
534
 
        
             
        
        
        
Answer:
easy
Step-by-step explanation:
 
        
             
        
        
        
Answer:
16 cities 
Step-by-step explanation:
if 5days = 10 cities 
8days=?
applying cross multiplication :
(8days × ten cities )÷5 day 
= 16 cities