Recognize Percent Growth or Decay Practice Test

A scientist records a sample’s mass (in grams) after each processing step:

Step $n$: 0, 1, 2, 3

Mass $M(n)$: 200, 180, 162, 145.8

Classify the pattern and identify the constant percent rate per step.

A savings account is modeled by the function $A(t)=2500(1.04)^t$, where $t$ is in years.

What is the constant percent rate of change, and is it growth or decay?