Answer: 76 meters
Step-by-step explanation:
top side left blank = 18 because it is congruent to the bottom
left side blank is 4 + 4 + 4 (right side lengths added) 
left side blank is 12
add all side lengths together for perimeter
12 + 18 + 4 + 8 + 4 + 8 + 4 + 18 = 76
76 meters
 
        
             
        
        
        
Density is Mass divide by Volume
D = m/v
D = 35g / 14cm3
D = 2.5 cm3
Answer: 
B) 2.5cm3
{Hope that helps}
        
             
        
        
        
Answer:
13cm
Step-by-step explanation:
square 12
square 5
add the answers 
then square root the answer