Question

At the beginning of an experiment, there are 600 grams of contaminants. Each hour, half of the contaminants are filtered out. How many grams of contaminants remain after 4 hours?

Answer 1

37.5 grams of contaminants will remain after 4 hours.

Answer 2

First hour - 300
Second hour - 150
Third hour - 75
Fourth hour - 37.5