Answer:
isosceles trapezoid 
Step-by-step explanation:
1) find the distance of the points 

AB = 
BC = |7-4| = 3 
CD = 
AD = |9-2| = 7 
2) equation of the line that passes threw BC 
y = 7 
3) equation of the line that passes threw AD 
y = 5 
conclusion 
the quadrilateral has two parallel sides and two congruent sides, so it is a isosceles trapezoid 
 
        
             
        
        
        
Calculate standard  Z values for the given data:- 
z = (80 - 110) / 20 = - 3/2 = -1.5
and z = (115 - 110) / 20 =  0.25
so we need  Prob ( -1.5 < z < 0.25)
Using standard tables this  comes to 0.5319  Answer
 
        
             
        
        
        
1/a
The b^-3 in the denominator and numerator cancel out
        
             
        
        
        
Only 3 is needed 
Step-by-step explanation: