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

Question

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

anonymous · Answer

If the rate is less than 1, it's decay.
If the rate is more than 1, it's growth.

anonymous · Answer

The rate of change in a % would be the change from 1.00 (100%).

Ex.
If there is a 20% change over time, your rate would be 1.20
If there is a -10% change over time, your rate would be 0.9

96mertcank96 · Answer

so it is a decay and 10% change?

anonymous · Answer

Your rate is 1-.12 = .88

Convert .88 to a percentage (%).

Take that percentage and subtract it from 100%.

100% - __% = rate of change %

anonymous · Answer

(Still need to include positive or negative in front of the %)

96mertcank96 · Answer

wait what?