25 million 
number of bacteria doubles every minute 
 
        
             
        
        
        
 Answer:

Step-by-step explanation:
 
        
             
        
        
        
Answer:
f(x)=4x(x-3)
Vertex=3/2, -9
Step-by-step explanation:
First, factorize it.
That is equal to 4x(x-3)
Therefore, x intercepts are 0 and 3, as  at least one of them need to be 0.
To find the vertex, first find the x of the vertex, which you can do by finding the average of the x intercepts, so it will be 3/2
Then, find the y, by making x in the original equation equal 3/2. This will give us -9 as the y.
The vertex will by 3/2, -9
 
        
             
        
        
        
Answer:
1. f(4) or f(n)= 28
2. f(-2) or f(n)= -2
(please consider marking brainliest <3 )
Step-by-step explanation:
n=4                           n=-2
f(n)= 5(n)+8              f(n)= 5(n)+8
f(n)= 5(4)+8              f(n)= 5(-2)+8
(n)= 20+8                 f(n)= -10+8
f(n)=28                      f(n)=-2
 
        
                    
             
        
        
        
9.5 is your answer if you can do that because 3/2 is 1.5