Measuring in light-years also allows astronomers to determine how far back in time they are viewing , Because light takes time to travel to our eyes. Everything we view during the dark in night has already been happened.
Answer:
C
Explanation:
It was in a quizlet. Hope this helps!
Area denometer and square expression
Vertical angles
60=x+10
-10 -10
50=x
x=50
Answer:something specific
