Question

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 × 10n
where 1 ≤ a < 10
and is a one-digit number.(1 point)
Responses

3 × 10−8
3 times 10 superscript negative 8 baseline

3 × 108
3 times 10 superscript 8 baseline

3 × 10−9
3 times 10 superscript negative 9 baseline

3 × 109
3 times 10 superscript 9 baseline

Answer 1

3 × 10⁻⁹

Reason: 0.000000003 = 3 × 10⁻⁹ (move the decimal 9 places to the right to get 3).