what is the sum of the measures of the interior angles of a regular polygon if each exterior angle measures 72

Explain how you can use the associative property to evaluate (7x50)x4.

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.

Which type of graph would allow us to quickly see how many students between 100 and 200 students were treated?