A bacterium reproduces by dividing into two, and after a certain growth period, it divides into two again. As the bacteria continues to divide, it will continue to divide in two. How many bacteria will be in a system starting with a single bacterium AFTER 20 divisions?

Ascientist wants to use a model to present the results of his detailed scientific investigation. why would a model be useful? a )because the model makes the concepts easier to understand b) because the model is easy to put together and to use c) because the model prevents other scientists from asking questions d) because the model requires the audience to pay full attention to it i don't know what to choose because between a and d a is much more likely than d because it only wants to get the attention of the audience. i'm confuse.