If something is perpendicular, (in a line) then it creates 4 90 degree angles.
Two on the top, and two on the bottom. 
I hope this helps!
~kaikers
        
             
        
        
        
Given:
Uniform distribution of length of classes between 45.0 to 55.0 minutes. 
To determine the probability of selecting a class that runs between 51.5 to 51.75 minutes, find the median of the given upper and lower limit first:
45+55/2 = 50
So the highest number of instances is 50-minute class. If the probability of 50 is 0.5, then the probability of length of class between 51.5 to 51.75 minutes is near 0.5, approximately 0.45. <span />
        
             
        
        
        
Answer:
3
Step-by-step explanation:
 
        
             
        
        
        
Answer:
P = 12 + 5x
Step-by-step explanation:
P = a + b + c
P = 7 + (x + 4) + (4x + 1)
   = 7 + x + 4 + 4x + 1
   = 12 + 5x
 
        
             
        
        
        
7033/10000 is the answer you're looking for