Acylinder has a height of 16 cm and a radius of 5 cm a cone has a height of 12 cm and a radius of 4 cm. if the cone is placed inside the cylinder as shown what is the volume of the air space surrounding the cone inside the cylinder

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.