Answer:
The value of x is 47°
and the value of y is 100°
 
        
             
        
        
        
Answer:
C (900)
Step-by-step explanation:
50 for each orchestra
40 for each balcony
600 x 50 = 30000 
39000/40 = 975
600+975=1575 not correct
750 x 50=37500
750 x 40 = 30000
not correct
900x50=45000
600x40=24000
correct
  
        
                    
             
        
        
        
Answer: 2,1 & 2
Step-by-step explanation:
 
        
                    
             
        
        
        
Answer:
832
Step-by-step explanation:
standard deviation =228 minute
error =13 minute given 
confidence level =905% =0.90
α=1-0.90=0.1

we know that sample size should be greater than




n=832