The monthly percentage decay rate for a certain exponential function is 8%. By what per- centage does the function decay in a week? (Assume there are four weeks in a month.)
A) 2.06%
B) 2.28%
C) 1.88%
D) 2%

Question

Quizplus · Accepted Answer

To find the weekly decay rate, we use the formula for exponential decay: (1 - monthly rate)^(1/4) - 1. The monthly rate is 8%, so the weekly rate is (1 - 0.08)^(1/4) - 1 ≈ 0.0206 or 2.06%.

The Monthly Percentage Decay Rate for a Certain Exponential Function