What equation can be made for the fact that there are twelve heads?
A. There are some dogs and people in a shelter.
You count twelve heads, and
How
many dogs and how many people are there?
+

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.