Roughly, it takes light less than 0.000000003 of a second to travel a one-meter distance. Express this number in the form of a x 10^n where 1 < a < 10 and is a one-digit number.
1. 3 x 10^8
2. 3 x 10^-9
3. 3 x 10^9
4. 3 x 10^-8
1 answer
The correct answer is: 2. 3 x 10^-9
1 answer