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

i can help you

Answer 2

You start out with 600 grams

Every hour, it reduces by half

Initially - 600
1 hour - 600/ 2= 300

after another hour
2 hours after the initial, you would decrease AGAIN by half
so 300/ 2 = ??

and then another hour later
(that is, 3 hours after the beginning of the experiment) would be half of the number you just got

and then to find out how many grams of contaminants are left after 4 hours, divide again by 2