Answer:
The estimate is  
Step-by-step explanation:
From the question we are told that   
     The sample size is  n =  522
     The sample proportion of students  would like to talk about school is  
   Given that the confidence level is  90 % then the level of significance can be mathematically evaluated as 
                   
                   
                   
Next we obtain the critical value of  
 from the normal distribution table, the value is  
                
Generally the margin of error can be mathematically represented as 
                
=>            
=>             
Generally the estimate the proportion of all teenagers who want more family discussions about school at 90% confidence level is  
                        
substituting values 
                      
 
        
             
        
        
        
Answer:
1125000
Step-by-step explanation:
just multiply them all
 
        
                    
             
        
        
        
Answer:
13 trails
Step-by-step explanation:
The histogram shows following numbers of trails:
- <u>0 - 6 km long</u> - 5 trails;
 - 6 - 12 km long - 9 trails;
 - 12 - 18 km long - 7 trails;
 - 18 - 24 km long - 3 trails;
 - <u>24 - 30 km long</u> - 4 trails;
 - <u>30 - 36 km long</u> - 1 trail;
 - <u>36 - 42 km long</u> - 3 trails.
 
So, there are 5 trails with length less than 6 km and 4 + 1 + 3 = 8 trails that are at least 24 km long.
In total, 5 + 8 = 13 trails
 
        
             
        
        
        
The picture is blank for me try it again