21. >
22. Distributive Property
        
                    
             
        
        
        
Do 81/3=27/3=9/3=3, So you see the answer is 3^<span>4, I don't know if that's the official way to solve it but it works.</span>
        
             
        
        
        
1 foot = 12 inches
Conversion factor is 12
        
                    
             
        
        
        
Answer:
400 m/s
Step-by-step explanation:
u=0 m/s
t=20 s
a=20 m/s²
v=u+at
=0+20×20
=400 m/s