To arrange the decimals in order from greatest to least, let's compare each set of decimals one by one:
-
1.9, 1.09, 1.19:
- 1.9 (greatest), 1.19, 1.09 (least)
- Order: 1.9, 1.19, 1.09
-
1.99, 1.9, 1.09:
- 1.99 (greatest), 1.9, 1.09 (least)
- Order: 1.99, 1.9, 1.09
-
1.009, 1.09, 1.9:
- 1.9 (greatest), 1.09, 1.009 (least)
- Order: 1.9, 1.09, 1.009
-
1.09, 1.9, 1.99:
- 1.99 (greatest), 1.9, 1.09 (least)
- Order: 1.99, 1.9, 1.09
Now, we need to find the set that is already ordered from greatest to least:
Only the second response, 1.99, 1.9, 1.09, is in order from greatest to least.