Drills

Calculating repeated growth and decay with multipliers raised to powers.

Author note — to cover

Fluency — compound interest and depreciation over two or three periods, rates like 10% and 20% keeping every balance exact (4 questions).
Exponential change — doubling populations and halving doses, and counting the periods until a target is passed (4 questions).
Contrast — simple against compound interest and linear against exponential growth, where adding the same amount each year is the planted model (4 questions).

The test

—coming soon—

Where to go next

This mixed review uses the methods from these learning pages: