Answer:
You would usually use 3.14
Step-by-step explanation:
It kind of depends on where you are using it. In an equation, pi would be used as 3.14 and the answer would be approximated. To write it anywhere else (I dont know where else you would though), you would do the pi symbol. I hope this helps.
 
        
                    
             
        
        
        
Answer:
1/4 -or- 4
Step-by-step explanation:
take the x-axis value 16 and divide by the other x-axis value, 4.
  
        
             
        
        
        
I'm assuming the question looks like this?

If so then the answer should be:

Hope this helps!
 
        
             
        
        
        
The answer is <span>C.) 2
The general form of formula is
y = a </span><span>• r^x
y - the total number of bacteria after x period of time
a - the initial number of bacteria
r - growth rate
x - period of time
Let's compare:
</span>y =    a   • r^x
<span>y = 280 • 2^x
Since r = 2, the growth rate is C.) 2</span>