Answer
3 $\times 10^{8}$ m/s
Work Step by Step
We can express the speed of light in meters per second as follows:
$c=(0.3Gm/s)(\frac{10^9m}{1Gm})$
$\implies c=0.3\times 10^9m/s$
$c=3\times 10^8m/s$
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