as the following pic you can see the answer.
#diameter is 8 so radius is 4
 
        
             
        
        
        
The slope is 0 I’m pretty sure because it is a horizontal line, if it was a vertical line it would be undefined
        
             
        
        
        
Answer:
4.04 x 10^0 people/km^2 (x 10^0 is fairly redundant but if the answer is required in standard form then include it)
Step-by-step explanation:
Population Density = Population/Area
= 3.11 x 10^7 / 7.69 x 10^6
= 31,100,000 / 7,690,000
= 3110 / 769 
= 4.04
= 4.04 x 10^0
 
        
             
        
        
        
A straight angle is 180 degrees in a right angle is 90 degrees
        
             
        
        
        
Bcoz a stright angle is 180 degrees, and l and k r parallel lines, so it means ...