1. Math
2. Calculus
3. write a formula for the situation the quantity q of...

# Question: write a formula for the situation the quantity q of...

###### Question details

Write a formula for the situation. The quantity Q of air pollutant that remains from an air sample decreases by 20% for each filter it passes through. Express the quantity Q of pollutant that remains for an air sample that has 400 units of pollutant initially if the sample passes through n filters.