The distance from the old north church in boston to charlestown is approximately 1,410 meters. even on a fast horse, that distance would take several minutes to travel. on april 18,1775, lanterns were shown from the steeple of the old north church across the charles river to warn american patriots that british soldiers were traveling inland via water. the speed of light is approximately 3 times 10^8 meters per second. how many seconds did it take for the light to be visible in charlestown? express answer using scientific notation. hel!!