Answer:
8cm
Step-by-step explanation:
2 cm =1 ft so if i multiply it by 4ft, and remember 2 cm =1 ft so 2×4=8
8cm
 
        
             
        
        
        
First Divide: 21.75/ 30
You will get 0.725
Then, multiply 0.725 by 100%
Then your answer should be: 72.5%
 
        
             
        
        
        
1,3, and 4 are similar shapes
        
             
        
        
        
I think the answer is A. Or the answer is A. 
Try downloading the app Socratic it like Brainly but I think it’s more helpful