Leanne earned $400 and $500 in interest the last 2 years. how much interest must she earn this year so that her average earnings over the three year period is more than $600

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.

Rhombus adef is inscribed into a triangle abc so that they share angle a and the vertex e lies on the side bc . what is the length of the side of the rhombus if ab=c, and ac=b.

Alex's monthly take home pay is $2,500. what is the maximum bad debt payment he can maintain without being in credit overload?