Pretty sure the answer is 247,000
        
                    
             
        
        
        
Answer:
 (-2, -1).
Step-by-step explanation:
 y = x² + 4x + 3
Completing the square:
y = (x + 4/2)^2 - (4/2)^2 + 3
y = (x + 2)^2 - 4 + 3
y = (x + 2)^2 - 1.
This is vertex form and the coordinates of the vertex are (-2, -1).
 
        
             
        
        
        
Answer:
   10.5%
Step-by-step explanation:
The tangent of the angle is the ratio of rise to run.
   tan(angle) = grade
   tan(6°) ≈ 0.105 = 10.5%
The grade will be 10.5% for an angle of elevation of 6°.