Answer:
5;5 and 65; they are congruent 
 
        
                    
             
        
        
        
Answer:
Slope of PQ = 0 
Slope of MN = infinity
PQ and MN are perpendicular to each other
Step-by-step explanation:
for any two points  (x1, y1),  (x2, y2)given in coordinate plane slope is given by

For any line if slope is zero it is parallel  to X axis and perpendicular to Y axis
For any line if slope is infinity it is parallel  to Y axis and perpendicular to X axis
Also we know X and Y are perpendicular to each other. 
Since slope of PQ is zero it is parallel  to X axis and perpendicular to Y axis
Since slope of MN is infinity it is parallel  to Y axis and perpendicular to X axis.
Thus two lines PQ and MN are perpendicular to each other.
 
        
                    
             
        
        
        
Problem Page Question An urn contains black and pink balls. Four balls are randomly drawn from the urn in succession, with replacement. That is, after each draw, the selected ball is returned to the urn. What is the probability that all balls drawn from the urn are pink? Round your answer to three decimal places.
 
        
             
        
        
        
Answer:
option (a) $250
Step-by-step explanation:
Data provided in the question:
Fixed cost = $500
For 100 units produced Total cost = $3,500
For 101 units produced, Total cost = $3,750
Now,
Marginal cost is calculated as:
Marginal cost =  
thus,
Marginal cost =  
or
Marginal cost =  
or
Marginal cost = $250
Hence,
The correct answer is option (a) $250