Answer:
i cant solve it for you but i will tell you how to do it 
Step-by-step explanation:
You add them all up from least to greatest on a piece of paper then use your two fingers starting from the least and the greatest and go down the line if you get more than 1 number you must add them both up and divide by 2.
 
        
             
        
        
        
I believe it is C, but i'm not 100% on that
        
             
        
        
        
Answer:
Step-by-step explanation:
 
        
             
        
        
        
Given:
Side length of base = 8
Slant height = 6
To find:
The surface area of the square pyramid.
Solution:
Surface area:

where A is the area of base 
p is the perimeter of base
s is the slant height
Area of base (A) = 8 × 8
                            = 64
Perimeter of base(P) = 4 × 8
                                   = 32
Substitute these in the formula:



The surface area of the square pyramid is 160 unit².
 
        
                    
             
        
        
        
Answer:
Step-by-step explanation:
You have to use the triangle inequality theorem:
12cm, 4cm, xcm
x > 4cm - 12cm
x > -8cm
x < 12cm - 4cm
x < 8cm
-8cm < x < 8cm