Do the situations represent exponential growth, exponential decay, or neither?

Select Exponential Growth, Exponential Decay, or Neither for each situation.
Situation Exponential Growth Exponential Decay Neither
A population of bacteria increases at a rate of 12% per hour.

An antibiotic is applied at a rate of 10 milliliters per hour.

The bacteria population begins to decrease by 15% per day.

The antibiotic dosage is reduced by 12 milliliters per day.