What is the equivalent of 6/18​

Using two or more complete sentences, describe how you can find a vector parallel to b=-2,3

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.

Apackage of five erasers cost 0. $.39 at this rate how many how much would 60 erasers cost in dollars and cents