Answer: I think that you were suppose to complete the sentence. So instead of saying "No hay muchos." You were suppose to say "No hay muchos estudiantes en la Nebrija." I hope this helps. :)
Answer:
Tengo la clase de matemáticas en la tarde. La clase empieza a las seis p.m. y termina a las a las ocho p.m. Todavía estoy a tiempo para la clase.
Translation:
I have math class in the evening. The class starts at six p.m. and ends at eight p.m. I am still on time for the class.