Answer:
0.79
Step-by-step explanation:
We have been given that a population of 430 animals decreases at an annual rate of 21%. We are asked to find the multiplier for the rate of exponential decay.
We know that an exponential decay function is in form
, where,
a = Initial value,
r = Decay rate in decimal form.
Let us convert 21% in decimal form as:

Upon substituting our given values, we will get:


Therefore, the multiplier for the rate of exponential decay is 0.79.