Answer:
Step-by-step explanation:
The opposite side to angle B is 4. It is the line AC. AC is not connected in any way to <B
The adjacent side is one of the two sides making up <B. It is 3. 
Tan(B) = opposite / adjacent
Tan(B) = 4/3
<B = tan-1(4/3)
<B = 53.13
 
        
             
        
        
        
Answer:
1st one is yes 
Step-by-step explanation:
the other two im not sure about
 
        
             
        
        
        
Answer:
x = 2
Step-by-step explanation:
The line goes straight through the x axis
 
        
             
        
        
        
Answer: See attached graph
 
        
                    
             
        
        
        
Complete Question 
A biologist reports a confidence interval of (3.5,4.9) when estimating the mean height (in centimeters) of a sample of seedlings. What is the estimated margin of error and the sample mean?
Answer:
The  margin of error is  
 The  sample mean is  
Step-by-step explanation:
from the question we are told that 
    The  upper limit is  
     The  lower limit is  
Generally the margin of error is mathematically represented as 
       
       
      
Generally the sample mean is mathematically evaluated as 
         
 =>    
=>    