A sporting goods store bought a ski set at a cost of $255. Later, the ski set was marked down 20% from its selling price and then marked
down another 30%. The total markdown is the greatest possible markdown
without the store losing money. Find the original selling price. Round to the
nearest dollar as needed.

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.