In this question:
there is answers to most of my questions. However, the use of к is left out..
I've seen things like, "(I have a meeting/I talk) from six until eight in the morning." -> "(У меня встреча/Я говорю) с/от шести к/до восеми утра." with genitive forms of the numbers, and с and к together, or от and до together.
So what about using к?