Chapter 31.2
Exponential growth and decay by percentage
What You'll Learn
Convert percentage growth and decay rates into exponential growth factors
Build exponential models using initial values and percentage-based rates
Solve exponential equations using logarithms to find unknown time or depth values
Apply exponential decay and growth formulas to real-world population and light intensity problems
What You'll Practice
1
Modeling population growth with percentage increases over time periods
2
Calculating decay depth when intensity reaches a target percentage
3
Using logarithms to solve for time in exponential growth scenarios
4
Converting between time units and interpreting exponential results
Why This Matters
Understanding exponential growth and decay by percentage is essential for analyzing real-world phenomena like population dynamics, compound interest, radioactive decay, and environmental changes. This skill is foundational for biology, economics, chemistry, and any field involving rates of change over time.
Before You Start — Make Sure You Can:
This Unit Includes
2 Video lessons
Practice exercises
Skills
Exponential Functions
Growth Factor
Decay Factor
Logarithms
Percentage Rates
Modeling
Real-world Applications
