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CAIE IGCSE Mathematics Extended E1.17.1 Use Exponential Growth and Decay Questions

Work through Extended CAIE IGCSE Mathematics exponential models by applying compound multipliers and solving for unknown rates or periods.

Syllabus
2028–2030
Course
Mathematics 0580
Level
Extended

Exam points

  • model exponential growth and decay using repeated percentage multipliers
  • calculate future or past values with a compound growth or decay factor
  • solve for a rate or number of periods and round the resulting population or value

CAIE IGCSE Mathematics Extended E1.17.1 Use Exponential Growth and Decay Questions question 1

[Maximum number: 2]

The number of trees in a forest is decreasing exponentially at a rate of 1.75% per year.
Eleven years ago there were 980 trees.
Calculate the number of trees in the forest now.
Give your answer correct to the nearest integer.

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