Advanced MathMediumValue after several years of percent decline
Advanced Math practice question
A population of 5,000 declines by 10% each year. What is the population after 3 years?
Answer: 3645
5,000 × 0.9³ = 5,000 × 0.729 = 3,645.
Common wrong answers
- If you answered 3500
- 3,500 subtracts 10% of 5,000 three times (linear decline).
- If you answered 4050
- 4,050 is the population after 2 years.
- If you answered 3280.5
- 3,280.5 is the population after 4 years.
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