Question

A=21000(1-0.12)^t What is the rate of change per time period

Answer 1

It is, the FitnessGram™ Pacer Test is a multistage aerobic capacity test that progressively gets more difficult as it continues. The 20 meter pacer test will begin in 30 seconds. ... The running speed starts slowly, but gets faster each minute after you hear this signal

Answer 2

The rate of change per time period :

The answer is : "exponential decay and 12 %"

I hope this helps

A= 12000 (1-0.12) ^t

0.12(move decimal twice right) = 12%

therefore it is decay