Question

Light travels at 5.87x10^12 miles in one year if a star is 2x10^4 light years away, how many miles away is that star?

Answer 1

1.174x10^17 miles

Explanation:

5.87x10^12 x 2x10^4.

(5.87x2)(10^12x10^4)

=11.74(10^16)

In Sci. Not., you cannot have a number less than 1 or greater than 10, so multiply these numbers together and move the decimal one to the left.

Your final answer should be 1.174x10^17 miles.