<span>Given that the average
time it takes to replace a defective car radiator is 70 minutes with a
standard deviation of 12 minutes. 
The 90% confidence interval of a random
sample of 50 is given by

</span>
 
        
        
        
Answer:
-240
Step-by-step explanation:
Since 20 is right next to -12 that means you have to multiply.
 
        
             
        
        
        
Answer:
SSS
Step-by-step explanation:
KN / PD = 54/24 = 2.25
KB / PF = 49.5/22 = 2.25
BN / DF = 40.5/18 = 2.25
ΔKBN ~ PDF   (SSS) : two triangles are similar, their corresponding sides are in equal proportion.
 
        
             
        
        
        
Answer:
Step-by-step explanation:
In a parallelogram, the diagonals bisect each other.
4x - 5 = 3x
4x -3x = 5
        x = 5