The cost of five dinners in a restaurant is Rs 1,200. If 13% VAT is charged extra on the bill, how much should a customer pay to clear the bill ?​

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.

Table which ratio is equivalent to 3: 7? 6: 7 3: 21 24: 56 15: 30

Answer pls man im trying to get out of summer school