Answer:
1
Step-by-step explanation:
1/2x1x2
1
 
        
             
        
        
        
I don't think so I'm in forth grade
        
             
        
        
        
It should be C. the first floor is going to be 13 feet longer, so  x squared +13 is going to be the first floor
        
             
        
        
        
Answer and explanation:
To find : Calculate to the nearest 1/10th meter the length of the side of a 7th, 12th, and 30th hectare square plot.
Solution :
The area of the square is given by, 
 where s is the side length.
 where s is the side length.
We know,  
1) The area of square plot is 7 hectare.
Area in meter square is 
Substitute the value in the formula,
 
 
 
 
 
 
Side nearest to 1/10th meter is 264.8 meter.
2) The area of square plot is 12 hectare.
Area in meter square is 
Substitute the value in the formula,
 
 
 
 
 
 
Side nearest to 1/10th meter is 346.4 meter.
3) The area of square plot is 30 hectare.
Area in meter square is 
Substitute the value in the formula,
 
 
 
 
 
 
Side nearest to 1/10th meter is 547.7 meter.
 
        
             
        
        
        
For example:
L plus W
3 plus 6= 9
I plus W
4 plus 6= 10
total: 9+10= 19
(this is just an example)