The answer is 4+(9x1/10)+(5x1/1000)
Can i have a brainiest 
 
        
             
        
        
        
Answer:
Step-by-step explanation:
10: B
11: A
 
        
             
        
        
        
6x3=18 
The room is 18ft long 
100/2=50
The park is 50mm long
        
                    
             
        
        
        
A Pentagon has 5 sides, therefore just divide 100 into 5 sides .
100÷5 = 20 centimeters