Answer:
The ball will take 4.05 seconds to hit the ground.
Step-by-step explanation:
we have

This is a quadratic equation (vertical parabola) open down
The vertex is a maximum
we know that
The ball hit the ground when h=0
Solve the quadratic equation
For h=0

The formula to solve a quadratic equation of the form 
 is equal to
 is equal to

in this problem we have
 
  
so

substitute in the formula   


 ---> the time cannot be a negative number
  ---> the time cannot be a negative number

therefore
The ball will take 4.05 seconds to hit the ground.
 
        
             
        
        
        
X=11
The triangle equals to 180
Hope this helps!!
        
             
        
        
        
Answer:
12^4/5
Step-by-step explanation:
When doing this you put the number the base is raised to on top of the fraction and the root number on the bottom
 
        
             
        
        
        
square meter is the SI unit of area.
 
        
                    
             
        
        
        
Answer:  
=====================================================
Reason:
Plot the points (0,0) and (r,s). You can place (r,s) anywhere you want. 
Connect the two points mentioned and form a right triangle such that the segment from (0,0) to (r,s) is the hypotenuse of said right triangle. 
The horizontal leg has a length of r-0 = r units, while the vertical leg will be 's' units. 
Check out the diagram below.
We then apply the pythagorean theorem to say  where h is the hypotenuse. Solving for h gets us
 where h is the hypotenuse. Solving for h gets us  . We only focus on the positive square root since a negative hypotenuse makes no sense.
. We only focus on the positive square root since a negative hypotenuse makes no sense.
Since we made the hypotenuse the segment with endpoints (r,s) and (0,0), this means the hypotenuse length and the distance are the same thing. 
Therefore, the distance from (r,s) to (0,0) is 
As an alternative, you can use the distance formula to get the same answer. The distance formula is effectively the pythagorean theorem phrased a different way.