There are two forms for the Imperfect Subjunctive in Spanish. The -se form is considered the traditional form of the imperfect subjunctive, while the -ra is derived from an old Latin indicative form. Both are almost interchangeable in modern Spanish... So yes.
Answer:
Las enfermeras son las quién ayudan al doctor.
Tomas medicina para sentirte mejor.
No tengo fiebre ahorita. or Ahorita no tengo fiebre. whichever I think.
¿Cuantos hay? Means how many are there but to answer that u need to put a picture of the objects