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*10 to the power of n where 1 is less than or equal to a less than 10 and is a one-digit number

3 times 10 to the power of eight
3 times 10 to the power of nine
3 times 10 to the power of negative eight
3 times 10 to the power of negative nine

Answer 1

The time it takes light to travel one meter is approximately 0.000000003 seconds. In scientific notation, this can be expressed as:

\[ 3 \times 10^{-9} \]

This means:

- \( a = 3 \)
- \( n = -9 \)

So, the correct answer is:

**3 times 10 to the power of negative nine**.