Answer:
Option E
Step-by-step explanation:
This survey will not be reliable as it is chosen for convenience; the first 120 students to arrive in school on a particular morning and this collection of individuals may not be a representative of the population. The study may become biased because it does not take into account the latecomers among the students which might have been changed the study from systematically favoring certain outcomes.
 
        
             
        
        
        
The process used is division. If you go to math is fun.com they have a really good step by step example on how to do this. Please give this brainliest answer if I helped.
        
             
        
        
        
Do Pythagorean theorem. If you don't know what that is... 
Do A squared plus B squared Equals C squared and you will get your answer for the shape. Then calculate the area
 
        
                    
             
        
        
        
The answer is B
Volume of the cone: 63617.25
Volume of the cylinder: 891000
Hope this helps ;)