Answer:
Step-by-step explanation:
square-based pyramid:
volume V = (⅓)b²h	
     = (⅓)7²·16  
     ≅ 261.3	ft³
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Can't help with question 3. I haven't learned triangle-based pyramids.
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cone:
volume V = ⅓πr²h	
               = ⅓π17²·20	
               = 6052.8 yd³
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can't help with question 7. Never did this kind of pyramid.
 
        
             
        
        
        
Answer: try multiplication for the answer or use photomath
Step-by-step explanation:
 
        
             
        
        
        
Answer:
b is correct
Step-by-step explanation:
 
        
             
        
        
        
Answer: ]1, 2[
Step-by-step explanation:
![A \cap B=[0; 2[\\\\(A \cap B)-C=]1, 2[](https://tex.z-dn.net/?f=A%20%5Ccap%20B%3D%5B0%3B%202%5B%5C%5C%5C%5C%28A%20%5Ccap%20B%29-C%3D%5D1%2C%202%5B)