Light from the sun reaches earth in about 8.3 minutes the speed of light is 3.00*10^8 m/s what is the distance from the sun to earth?

Set up a unit conversion problem, arrange units to convert minutes to seconds, then cancel all time units.

8.3 minutes x (60 seconds/1 minute) x (3.00x10^8 meters/1 second) = 149,400,000,000 meters

Since the time is the term with the fewest number of significant figures (2), your answer should only be expressed with two sig figs as well.

1.5x10^11 m