Initially there are
4 bacteria cells
in the sample.
Every second,
each cell splits
into three
(triple). After 7
seconds, how
many bacteria
cells are there in
the sample?

Two airplanes start at the same place and travel in opposite directions,one at 395 miles per hour and the other at 422 miles per hour. how many hours will it take for the planes to be 2451 miles apart?