The speed of light in a vacuum is 2.998 Ã 108 m/s. what is its speed in miles per minute (mi/min) ?

Simply divide the speed of light by 1000 to get klm/sec

next divide the klm/sec by 1.6 to get miles/sec.

next multiply miles/sec by 60 to get miles per minute

= 11,242,500 miles/min

= 11,240,000 miles/min (with significant figures)