This is the 5700th most frequent Russian word.
применена
"Applied."
The word 'применена' indicates that an action (application of a teaching method) has taken place in the past.
В этом случае была применена новая методика обучения.
In this case, a new teaching method was applied.
The word 'применена' expresses anticipation of the appropriate application of technology in the future context.
Мы уверены, что технология будет правильно применена.
We are confident that the technology will be applied correctly.
Here, 'применена' conveys that the formula has been consistently utilized in a specific technical domain over time.