Is the equation A = 21000(1-0.12)t a model of exponential

Last updated: 7/19/2022

Is the equation A = 21000(1-0.12)t a model of exponential growth or exponential decay, and what is the rate (percent) of change per time period? exponential decay and 88% exponential decay and 12% exponential growth and 12% exponential growth and 88%