Naomi has taken six science tests so far this year. The tests are out of 100 points, and she has gotten the following scores. 64, 88, 92, 86, 81, 92

What must Naomi score on her seventh test in order to raise her mean to an 85?

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.