First put these in order from least to greatest.
1,2,2,4,8,9,9 is the correct order
Range is when we subtract the greatest value of our data set from the smallest so in our case it would be 9-1 which leaves us with our answer that 8 is your range.
        
             
        
        
        
90-n=3n
90=4n
22.5=n
Final answer 22.5
        
                    
             
        
        
        
It depend on what problem you have
        
             
        
        
        
Answer:
no it is not
Step-by-step explanation:
 
        
             
        
        
        
Answer:
240 cubic units
Step-by-step explanation:
2.5×8×12=240cubic units