Station #3

Last week we were required to attend 4 stations around the room to learn about exponential decay and growth. 
I am choosing to elaborate on station 3. 
In this station we had to complete 4 word problems. These word problems were something like 80 milligrams of pain reliever loses 40% of its strength every hour it is in your system. How much remains in your system 2 hours after to take the pill. The starting amount is 80, the decay percent is .4 so your equation would be A=80(0.60)^x. 
This means that after 2 hours, 28.8 milligrams are left in your system.