There are 150 people in Mr. Frederick's high school classes. One tenth of the students are going to the wrestling match. One fifth of those students will be selling candy as a fundraiser. How many students are going to the match and selling candy? Provide your answer as a numerical answer.

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.