Answer: 4
Step-by-step explanation:
3^2 + b^2 = 5^2
9 + b^2= 25
b^2 = 16
b = ±4
 
        
                    
             
        
        
        
The answer I believe is b
        
             
        
        
        
Answer:
7 toys 
Step-by-step explanation:
3+4=7
 
        
             
        
        
        
Answer: The answer is 314.28 cm² (approx.).
Step-by-step explanation:  Given that an engineer is going to install a new water pipe. The diameter of this circular pipe is, d = 20 cm.
We need to find the area 'A' of the circular cross-section of the pipe.
Given, diameter of the circular section is

So, the radius of the circular cross-section will be

Therefore, cross-sectional area of the pipe is

Thus, the answer is 314.28 cm² (approx.).