In one nanosecond (ns), light will travel 30.0 cm, about 1 ft. The speed of light (in a vacuum*) = 186,000 miles per second, or 0.000186 miles per nanosecond, around 1 foot/ns. *note: Light travels slower moving through matter.
No. She was on the committee that wrote the COBOL spec. and invented the "Hopper Nanosecond" a piece of copper wire just under a foot long that illustrates the maximum distance a signal can go in a computer in a nanosecond.
The speed of light in vacuum corresponds to 299.8 millimeters, or 11.8 inches, per nanosecond. As engineers, expected to be able to recognize and work with "close enough" figures, we often use "1 nanosecond = 1 foot."