Answer:
C
Step-by-step explanation:
The scale factor is the ratio of corresponding sides, image to original, so
scale factor =
=
=
→ C
The pattern is multiplying by 3. So it will be: 243, 729
The mean is 7.5 you add up all the numbers and then divide by the amount of numbers there is
<h3>
Answer: 8</h3>
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Work Shown:

It will take 8 hours for the population to reach 196,608 bacteria.
D. (I used 3.14 as pi so my answer was a little off so I just went with the one closest to my answer)