A light-year is defined as the distance the light can cover in one year.
The light travels at speed of

, and one year converted into seconds is

So the distance covered by the light in one year is

And this is the distance that corresponds to one light-year.
You can do pencil and paper or use a calculator if necessary
Your answer is <em>3.5</em>
Answer:
2-9=x
HOW
let the number be x
then 2 less than product 9
so
2-9
and a number
we don,t know number so take it x
so 2-9=x