Help with number 7 please

Real answers please. No links Or I’ll report you.

At school there are 526 students and 263 are girls about how likely is it that a randomly chosen student will be a boy

Me asap! what is the slope of this line? enter your answer in the box.

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.