Algebra-1

1. Determine the number of doubling periods:

Since the number of infected people doubles every day and we want to know the number on day 6, the number of doubling periods  is equal to the number of days passed, which is  (because we start counting from day 1).

2. Use the exponential growth formula:

The formula for exponential growth in this case is , where:

 is the final number of infected people.

 is the initial number of infected people. Here, .

 is the number of doubling periods, which is