HK consists of two part, HJ and JK
HK = HJ + JK
We know that:
HK = 12.2ft
JK = 3.1ft
HJ = ?
Let's plug our values into the equation above.
12.2ft = HJ + 3.1ft
Subtract 3.1ft from both sides.
9.1ft = HJ
 
        
             
        
        
        
In a polynomial, each constant (regular number) has a degree of 0. For example, 8 is really 8x to the power of 0.
        
             
        
        
        
Answer:
Step-by-step explanation:
-34 nickles is = 1.70
34 quarter is  = 8.50
1.70 plus 8.50 plus 4.90 = 15.1 i think
 
        
             
        
        
        
Answer:
a)  
    
 
    
b)  
    
 
  
c)  
Step-by-step explanation:
Part a
The confidence interval for the mean is given by the following formula:
 (1)
   (1)
The Confidence is 0.98 or 98%, the value of  and
 and  , and we can use excel, a calculator or a table to find the critical value. The excel command would be: "=-NORM.INV(0.01,0,1)".And we see that
, and we can use excel, a calculator or a table to find the critical value. The excel command would be: "=-NORM.INV(0.01,0,1)".And we see that  
Now we have everything in order to replace into formula (1):
 
    
 
    
Part b
 
    
 
  
Part c  
The margin of error is given by this formula:
 (a)
    (a)
And on this case we have that ME =0.4/2 =0.2  we are interested in order to find the value of n, if we solve n from equation (a) we got:
 (b)
   (b)
The critical value for 95% of confidence interval now can be founded using the normal distribution. And in excel we can use this formla to find it:"=-NORM.INV(0.025;0;1)", and we got  , replacing into formula (b) we got:
, replacing into formula (b) we got:
 
 
        
             
        
        
        
The first triangle you do 1/2 of 9 x 18 then the second one is 1/2 of 9 x 9 and then you add the two.