the best order-of-magnitude estimate for 0.00006?

- 10^-3
- 10^-4
- 10^-5 * my answer
- 10^-6

the best order-of-magnitude estimate for 789,000?
- 10^7
- 10^6
- 10^5
- 10^4 *my answer
I don't understand this quite well but I want to make sure my answers are correct. Thanks!

3 answers

http://en.wikipedia.org/wiki/Order_of_magnitude
So the first one would be 10^-6 and the second one would be 10^6 ?
For the second answer, it's B. I believe