Question

Nine seconds elapsed from the time Abigail saw the lightning until she heard the thunder. The lightning was about how many kilometers from Abigail? Sound travels about 1/3 of a kilometer per second.

Answer 1

distance = speed x time

Answer 2

A ratio could be helpful to figure this one out. Sometimes speeds can be pretty tricky to just put together in your head.

Answer 3

distance (km) = speed (km/s) x time (s)