It's going to be 35 present
Answer:
2.25 cm
Step-by-step explanation:
8x=18
x=2.25
Answer:
The correct option is D.
Step-by-step explanation:
It is given that the population of bacteria begins with 1 bacterium and triples every hour.
Let initial population be 1.
![P(0)=1](https://tex.z-dn.net/?f=P%280%29%3D1)
The population of bacteria after 1 hour is
![P(1)=1\times 3=3^1=3](https://tex.z-dn.net/?f=P%281%29%3D1%5Ctimes%203%3D3%5E1%3D3)
The population of bacteria after 2 hour is
![P(2)=3\times 3=3^2=9\](https://tex.z-dn.net/?f=P%282%29%3D3%5Ctimes%203%3D3%5E2%3D9%5C)
Similarly the population of bacteria after n hour is
![P(n)=3\times 3\times ...\times 3=3^n](https://tex.z-dn.net/?f=P%28n%29%3D3%5Ctimes%203%5Ctimes%20...%5Ctimes%203%3D3%5En)
If x is number of hours and y is the population of bacteria after x hour, then
![y=3^x](https://tex.z-dn.net/?f=y%3D3%5Ex)
The other way to find the population model is shown below.
The population model is defined as
![P=a(1+b)^x](https://tex.z-dn.net/?f=P%3Da%281%2Bb%29%5Ex)
Where, a is initial population and (1+b) is growth factor.
In the given situation the initial population is 1 and growth factor is 3, therefore
![y=3^x](https://tex.z-dn.net/?f=y%3D3%5Ex)
Therefore option D is correct.
Look at it step by step guys:a\9=-4 so u just cross in top and bottom that will be -36=a ,or a=-36.....
Its 36 .....................................