Answer: 210
<em>Step-by-step explanation: 70+70+70=210 and 40% for 210 students would add up to 120% of all students surveyed. Look if there is 70 students that's been surveyed that is 40% add 40% 3 times(40%+40%+40%)=120% of all students surveyed </em>
 
        
                    
             
        
        
        
Answer: 48 
Step-by-step explanation: just got it right on ap3x 
 
        
             
        
        
        
Answer:  22% of the pages are filled up
Step-by-step explanation: 900/9= 100 78% of 100 is 78 
22+78=100 therefore reaching 100 percent. since 78% is empty that means 22% is being used.
 
        
             
        
        
        
Answer: A. 8 
Hope this helps
        
             
        
        
        
the abswer of this question is c