Answer:
VERTICAL 
Step-by-step explanation:
  
        
             
        
        
        
Answer:  a) (176.76,172.24), b) 0.976.
Step-by-step explanation:
Since we have given that 
Mean height  = 174.5 cm
Standard deviation = 6.9 cm
n = 50
we need to find the 98% confidence interval.
So, z = 2.326
(a) Construct a 98% confidence interval for the mean height of all college students.

(b) What can we assert with 98% confidence about the possible size of our error if we estimate the mean height of all college students to be 174.5 centime- ters?
Error would be 

Hence, a) (176.76,172.24), b) 0.976.
 
        
             
        
        
        
To find the inverse of a relation, we switch the x and y values in each point.
So the inverse would be {(4, -3), (0, -1), (0, 6).
 
        
                    
             
        
        
        
The answers are A and D.
The numbers that you cannot simplify without having a radical in the answer are irrational numbers. 
√(4/16) = 1/4 or -1/4, rational number
√(9/16) = 3/4 or -3/4, rational number
√(9/4) = 3/2 or -3/2, rational number
√(3/16) = √(3)/4, NOT a rational number, cannot remove radical
√(3/4) = √(3)/2, NOT a rational number, cannot remove radical