Dec usually means December. If you think it might mean something else, you should ask your teacher.
Do you mean DEC phones?
Tarea is assignment .... and typically used to mean homework assignment by the parents in my school.
In Greek Dec means ten
"duty", "homework", "have to"
Macht seine Deutsch Hausaugabe means doing his German homework
Some words that use 'dec' to mean by or with ten are:decadedecagramdecahedrondecaloguedecameterdecapoddecasyllabicdecathalondecigramdeciliterdecimaldecimeter
Do you mean a decibell? A unit for measuring sound.
tarea deberes
It means the person is for homework and definitely believes in it (i.e. they probably like homework or give out homework often).
Belive in Jesus !!
Gross indecency
homework