Answer:
m = 21 inches
The model length is 21 inches
Question;
Use the scale factor 1:12 to find the missing dimension. Great white shark actually lengthy 21ft. Find the model length in inches.
Step-by-step explanation:
Given;
Scale factor = 1:12
Actual length a = 21 ft
Let m represent the model length;
The ratio of model length to actually length is given as;
m/a = 1/12
m = a/12 
Substituting a=21 ft;
m = 21/12 ft
Converting to inches;
1 ft = 12 inches
So,
m = 21/12 ft × 12 inches/ft
m = 21 inches
The model length is 21 inches
 
        
             
        
        
        
The area is 289.22 units squared
        
                    
             
        
        
        
Answer:
You have the right answer
Step-by-step explanation
 
        
             
        
        
        
Answer:
24 ft by 10 ft 
240 ft
Step-by-step explanation:
19.2/4 = 4.8 
4.8 · 5 = 24
8/4 = 2 
2 · 5 = 10
 
        
             
        
        
        
Answer:
68%
Step-by-step explanation:
  
 = 68%
I hope this helps!