Can someone please help... This is a quantitative (maths) question. I’m going to show the solved examples, Cena someone explain the examples to me?
Please ignore the question above and explain examples.

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.

Hey am have account in but wished to create an account here you guys will me with my make new friends of uk !

Three people are traveling and need to exchange the currency of their native country for the currency of the country they are visiting. drag each exchange to the category that shows the ratio of currencies in that exchange.