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%

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

=

=

= 300%

Therefore, Option D. will be the answer.

6 hours 48 min

step-by-step explanation:

68÷5=13.6

13.6×30=408min=6 hours 48 min.

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