The correct answer is $44.20. 
If we add up all the tips, the total is $442. If we divide this by the number of days (10), then we find the mean.
442 / 10 = 44.2
        
             
        
        
        
I think you need to add them all up first or do the 90 degree
        
             
        
        
        
Answer:
28.7
Step-by-step explanation:
a^2 + b^2 = c^2
25^2 + 14^2 = 821
Square root of 821 is 28.7.