You have a bad cough. You take cough drops that contain 100mg of menthol. Every 2 minutes the amount of menthol in your body cuts in half. A) Write a function to model this situation.

B) Is this growth or decay?

C) For the menthol to work there has to be more than 10mg in your body. How often do you need to take a cough drop so the menthol is affective?