Question

which of the contexts below represents exponential decline or decay?
answer
a population of 350 bacteria doubles every day.
a coin collection appreciates at a rate of 19.4% per year.
the amount of a certain medication in a persons bloodstream decreases by $\frac{1}{2}$ every week.
an elevator descends at a rate of 26 feet per second.

Explanation:

Answer:

The amount of a certain medication in a person's bloodstream decreases by $\frac{1}{2}$ every week.