For which pair of points can you use this number line to find the distance?

A number line going from negative 2 to positive 8 in increments of 1. Points are at 0 and 3.
(0, 3) and (3, 0)
(1, 0) and (–1, 3)
(2, 0) and (2, 3)
(–1, 0) and (–1, –3)

Which of these is and example of a literal equation? a) 6+30=6^2 b)3x-4y c)12=9+3x d)ax-by=k

45 was divided by a power of ten to get 4.5. what power of ten was it divided by? people 4.5

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.