There are 8 big fish for every 10 small fish, ..... 5 small fish.
        
             
        
        
        
Answer: $8470
Step-by-step explanation:
To solve this, you can substitute 4 for x:

Mikayla's scooter is worth around $8470 after 4 years. 
It was originally worth 13,500 dollars and depreciated by 11% every year. 
 
        
             
        
        
        
(t-2)(t+1)(t+1)
t^2+t-2t-2(t+1)
t^2-t-2(t+1)
t^3-t^2-2t+t^2-t-2
t^3+-3t-2
        
                    
             
        
        
        
4 3/8 is what I believe to be the answer.<span />
        
             
        
        
        
2 different possible ways if there is only 2 students.