PART - A : tent - 1 volume = 400 cubic ft
Tent -2 volume = 384 cubic ft. 
PART - B : I recommend Joe to make the tent -1 with base 10x10 ft. as it has more volume
<u>Step-by-step explanation:</u>
PART - A:
 tent 1 :
  Base = 10 x 10ft
  Height= 12 ft
  Volume = (1/3) (10x 10) (12) 
  = (1/3) (100) (12) 
= 400 cubic ft. 
Tent 2:
  Base = 12 x 12 ft
  Height= 8 ft. 
  Volume = (1/3) (12 x 12) (8) 
= 384 cubic ft. 
PART - B:
I recommend Joe to make the tent -1 with base 10x10 ft. as it has more volume
  
 
        
             
        
        
        
C) similar SAS
Your welcome:)