Answer: The correct option is (a) 21.3 dL.
Step-by-step explanation: We are given to find the number of deciliters that are equivalent to 9 cups.
Given that,
1 cup = 0.237 liters.
We know that
1 liter = 10 deciliters. So, we get
0.237 liters = 0.237 × 10 deciliters = 2.37 deciliters.
This implies that
1 cup = 2.37 deciliters.
Therefore, we get
9 cups = 2.37 × 9 deciliters = 21.33 deciliters.
Rounding to nearest tenth, we get
[tex]21.33~\textup{deciliters}\sim 21.3~\textup{deciliters}.[/tex]
Thus, 9 cups are equivalent to 21.3 deciliters.
Option (a) is CORRECT.
