Answer:
circumference = 2 * 22/7*10
440/7
Step-by-step explanation:
 
        
             
        
        
        
Answer:
Step-by-step explanation:
500×30=15000
 
        
             
        
        
        
A
This app won't let me do short answer
        
                    
             
        
        
        
Answer:
The difference in the sample proportions is not statistically significant at 0.05 significance level. 
Step-by-step explanation:
Significance level is missing, it is  α=0.05
Let p(public) be the proportion of alumni of the public university who attended at least one class reunion   
p(private) be the proportion of alumni of the private university who attended at least one class reunion   
Hypotheses are:
 : p(public) = p(private)
: p(public) = p(private)
 : p(public) ≠ p(private)
: p(public) ≠ p(private)
The formula for the test statistic is given as:
z= where
 where 
- p1 is the sample proportion of  public university students who attended at least one class reunion  ( ) )
- p2 is the sample proportion of private university students who attended at least one class reunion  ( ) )
- p is the pool proportion of p1 and p2 ( ) )
- n1 is the sample size of the alumni from public university (1311)
- n2 is the sample size of the students from private university (1038)
Then z= =-0.207
 =-0.207
Since p-value of the test statistic is 0.836>0.05 we fail to reject the null hypothesis.  
 
        
             
        
        
        
Answer:
12.5%
Step-by-step explanation:
8/64
(8*100)/64 = 12.5