A store owner recorded sales for one week. The histogram shows the number of sales in five price ranges.
Sales
40
30
Number of Solos
20
10
0-20 21-40 41-60 61-80 81-100
Sales Amounts
How many more sales were in the 41-60 price range than
the 61-80 price range?
A
3
B 15
6

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.