# A Simple Exponential Model in the Time of Covid

- Author:
- Simona Riva

- Topic:
- Exponential Functions

The app below shows an example of

*: you will learn how to create a simple mathematical model for a culture of bacteria. Explore it, using buttons and sliders. (***exponential growth****Note**: The*doubling time*of a population exhibiting exponential growth is the time required for a population to double, given that the population will always take the same amount of time to double.)A bacteria culture doubles in number every hour. The expression gives the number of bacteria in the culture after *h* hours.
(a) What does the constant coefficient 112 mean?
(b) What does the base 2 of the exponential term mean?
(c) How many bacteria are there after 3 hours?