Question

Each hour, the number of bacteria in Dr. Nall’s petri dish tripled. What percent is the population compared to the population the hour before?
A. 3%
B. 30%
C. 130%
D. 300%

Answer 1

Answer:

Option D. 300%

Step-by-step explanation:

Let the number of bacteria in Dr Nall's petri dish = x

After one hour number of bacteria in the petri dish = 3x

So the percentage of the population compared to the population the hour before will be

= $\frac{\text{Population after 1 hour}}{\text{Population before 1 hour}}\times 100$

= $\frac{3x}{x}\times 100$

= 300%

Therefore, Option D. will be the answer.

Answer 2

THE ANSWER IS THE D!!!!!!!!!!!!