It also means that a rhombus is formed from 2 identical equilateral triangles ( 2 identical 30 - 60 - 90 triangles forms one equilateral ) and a side of that triangle measures : 30 feet. 
      Answer:
      The perimeter of the garden :  4 * 30 = 120 feet
        
                    
             
        
        
        
Point- an exact loction in space with indefinite shape and size.
line- an object with no thickness that extends infinitely in 2 directions.
line segment- a portion of a line consisting of 2 end points and all point in between.
ray- a portion of a line consisting of 1 end point and all point in between.
opposite ray- 2 ray sharing the same end point and continuing infinitely in 2 direction.
plane- a flat surface that extends infinitely in all direction.
collinear- point that lie on the same line.
non collinear- point that do not lie on the same plane.
        
             
        
        
        
Answer: 
a

b

Ca  
     
Cb
     
Explanation:
From the question we are told that 
      The sample size is n  =  100
      The upper limit of the 95% confidence interval is  b =  47.2 years 
      The lower limit of the 95% confidence interval is   a =  34.5 years
Generally the sample mean is mathematically represented as 
          
=>    
=>    
Generally the margin of error is mathematically represented as 
          
=>      
=>      
Considering question C a   
From the question we are told the confidence level is  90% , hence the level of significance is    
        
=>    
The  sample size is  n =  22
Given that the sample size is not sufficient enough i.e  we will make use of the student t distribution table
 we will make use of the student t distribution table  
Generally the degree of freedom is mathematically represented as 
            
=>        
=>        
Generally from the student  t  distribution table the critical value  of   at a degree of freedom  of  21 is
 at a degree of freedom  of  21 is  
     
Considering question C b
From the question we are told the confidence level is  80% , hence the level of significance is    
        
=>    
Generally from the normal distribution table the critical value  of   is
 is  
     
 
        
             
        
        
        
Answer:
The total amount customer paid during those 3 years  is $1685
Step-by-step explanation:
We are supposed to find the total amount customer paid during those 3 years 
Customer made a tax payment = $1250 
He received a refund of amount = 550 
So, amount paid by him = 1250-550
Amount paid by him ==700
Now again He made a tax payment = $925 
Processing fee = $60
So, Total Amount paid by him =700+925+60
Total Amount paid by him =1685
Hence the total amount customer paid during those 3 years  is $1685
 
        
             
        
        
        
Answer:
a). ΔABC ~ ΔBDC
b). m(BD) = 6 units
Step-by-step explanation:
If ΔABC ~ ΔBDC,
a). Ratio of the corresponding sides of both the triangles will be equal.




Since Ratio of the corresponding sides are same, therefore, both the triangles are similar.
b). 

BD = 
BD = 6