Answer:
9 tons of vegetation the elephants eat in a week
Explanation:
There are 4 elephants in the preserve. Each elephant eats 2 1/4 tons of vegetation a week
Each elephant eats 2 1/4 tons =

Each elephant eats 9/4 tons of vegetation
so 4 elephants eats =
tons
9 tons of vegetation the elephants eat in a week