Determine the number of non-drinkers which are required for an event where there are 100 members attending and 200 guests.

What is the rotational symmetry of a wheel

8000 + 8800 + 8000 + 8 million + 80 trillion + another a katrillion equals

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.