A chicken farmer started his summer with 6 chickens. By fall, he counted 36 chickens,
and by
winter he counted 216 chickens Which expression
represents the number of chickens he had by
winter?
Need help asap!

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.