Let's assume 
boiling point is y
altitude is x
we are given 
This relationship between altitude and boiling point is linear
At an altitude of 1000 feet, water boils at 210°F
so, first point is (1000,210)
so, x1=1000 , y1=210
At an altitude of 3000 feet, water boils at 206°F
so, second point is (3000,206)
so, x2=3000,y2=206
now, we can find slope 

now, we can plug values


now, we can use point slope form of line 

so, we can plug it 

so, point slope form of line is 

now, we can plug x=8000
and then we can solve for y


So, 
the boiling point of water at an altitude of 8000 feet is 196°F..........Answer
 
        
                    
             
        
        
        
Answer:
2.35
Step-by-step explanation:
-4.05 + 3.1 + 8 = 7.05/3=2.35
 
        
             
        
        
        
Answer:
1.-9x^2
2.16x^4
3.x^2+4x
4.x^2+4x+4
5.x^2-x-12
6.x^4+2x^3-4x^2
Step-by-step explanation:
 
        
                    
             
        
        
        
The answer is 9.48. also I rounded