The ANWSER is 2/4 I hope I helped
        
             
        
        
        
Answer:
11
Step-by-step explanation:
 9
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what the- to easy bro
 
        
             
        
        
        
The length of the altitude is 
Explanation:
Let ABC be an equilateral triangle.
It has sides of length 16 cm
Let AD be the altitude of the triangle. 
We need to determine the length of an altitude.
Let AC = 16 cm and CD = 8 cm
Let us consider the right angled triangle ADC
Using the Pythagorean theorem, we have,

Substituting the values, we get,
  
  
  

The length of the altitude is 
 
        
             
        
        
        
Answer:
The null and alternative hypotheses are:


Under the null hypothesis, the test statistic is:

Where:
 is the sample mean
 is the sample mean
 is the sample standard deviation
 is the sample standard deviation
 is the sample size
 is the sample size
 
     
           
Now, the right tailed t critical value at 0.05 significance level for df = n-1 = 10-1 = 9 is:

Since the t statistic is less than the t critical value at 0.05 significance level, therefore,we fail to reject the null hypothesis and conclude that there is not sufficient evidence to support the claim that the average phone bill has increased.