The product of 4 and the sum of 7 and a number.
Meaning:
                               
                     4 ( 7 + n )
        
                    
             
        
        
        
The function of the water balloon is an illustration of a quadratic function.
The balloon will splat on the ground after 2.5 seconds
The function is given as:

When the balloon splats on the ground, the value of h(t) is 0.
So, we have:

Expand the expression

Factorize the above expression

Factor out 2t - 5 in the 2t - 5

Split the equation into 2

Rewrite as:

Solve for t

The value of t cannot be less than 0 i.e. negative.
So, we have

Divide 5 by 2

Hence, the balloon will splat on the ground after 2.5 seconds
Read more about quadratic functions at:
brainly.com/question/11631534
 
        
             
        
        
        
Answer:
B
Step-by-step explanation:
If 12 pencils are 1.25, 24 would be 2 x 1.25. And 4 notebooks worth 0.65 would be 4 x 0.65
Added up, this expression is:
(2 x 1.25) + (4 x 0.64)
 
        
             
        
        
        
Answer:
It's B.
Step-by-step explanation:
Z=-3, z=6
 
        
             
        
        
        
Answer:
5/100
Step-by-step explanation:
5 over 100 is 5%, while the other options are 50%