Question

A colony of bacteria is made up of (5) cells. Asuuming that no cells die and that every cell divides, how many cells will there be in the colony after four divisions?

a 20
b 80
c 160
d 625

I'm thinking its b.

Answer 1

I think 1 cell divided 5 times is
2⁵ = ??
Then 5 times that for 5 cells.

Answer 2

^ no, in the exercise it's 4 divisions so it must be 2^4
then multiple to 5

Answer 3

So every time you divide the number before is multiplied by two. So you multiply by two for every example.

5*2*2*2*2

Which would become
5*2^4
=80