Answer:
5secs
Step-by-step explanation:
Given the equation of the height expressed ad;
h(t) = - 16t^2 + initial height
Given that initial height = 400feet
h(t) = - 16t^2 + 400
The waste will hit the ground at when h(t) = 0
substitute
0 =  - 16t^2 + 400
16t^2 = 400
t² = 400/16
t² = 25
t = √25
t = 5secs
Hence it will take the easte 5secs to hit the ground
 
        
             
        
        
        
Answer:
8
Step-by-step explanation:
 
        
                    
             
        
        
        
X² <span>− 3x − 70=0
</span>x² + 7x - 10x − 70=0
x(x+7) - 10(x+7) = 0
(x+7)(x-10) = 0
x + 7 = 0   or   x - 10 = 0
x = -7              x = 10
Answer: x=-7,  x=10 
        
                    
             
        
        
        
Answer:
Answer D:  12
Step-by-step explanation:
Three distinct denominators are shown here:  4, 3 and 2.  The LCD is 12.
This corresponds to answer D.
 
        
             
        
        
        
Answer:
20.30
Step-by-step explanation:

To the nearest tenth =20.30
<h2><em>OladipoSeun</em></h2>