"estas" should be the answer that does in the blank
I’m guessing you are referring to the actual number in time like it’s three ten.
In Spanish to say that it’s is 3:10 you would say “son las tres diez”.which in English it is translated to it is three ten.or in number form it would be it is 3:10.but you would need to specify if it’s the time or ratio of some sort.
Presta atención en clase en lugar de dormir :))
