Problema Solution

A biologist finds that the population of a certain type of bacteria doubles each half-hour. An initial culture has 120 bacteria.

How long will it take for the number of bacteria to reach 7,680?

Answer provided by our tutors

A = P (2^n) 

For this problem: 

7680= 120(2^n)

2^n=64

Then, n = 6 answer