Question

bacteria colonies can triple in size every 4 days. If you start with 150 bacteria microorganisms, how large with the colony be after 16 days?

Answer 1

It triples in size every 4 days.  In 16 days it will be 3 * 3 * 3 * 3 times bigger.

3 * 3 * 3 * 3 = 81
Therefore, after 16 days, the colony will contain (81 * 150) or 12,150 microorganisms.