Ana a cumpărat 15 caiete, unele cu 2 lei, altele cu 4 lei bucata. Câte caiete, de fiecare fel a cumpărat Ana, dacă pentru toate caietele a plătit 44 de lei?

Suppose the radius of a circle is 16. what issuppose the radius of a circle is 16. what is its circumference its circumference

Find the cosine function that is represented in the graph.

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.