the time between a lighting flash and the following thunderclap may be used to estimate, in kilometers, how far away a storm is. how far away is a storm if 12 seconds elapse between the lighting and the thunderclap

use the formula d = t/3 . where t is the time in seconds between the flash and the thunderclap

a 4 kilometers
b 5 kilometers
c 15 kilometers
d 36 kilometers