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Mathematics · Grade 11 CAPS

Finance, Growth & Decay

Finance, Growth & Decay is one of 10 topics in the Grade 11 Mathematics CAPS syllabus, covered across 3 lessons on Study Vault. Below are real practice questions from this topic with full worked answers.

Sample practice questions

Easy

1. Write down the compound growth formula for accumulated amount A.

Answer: A=P(1+i)^n — The compound growth formula is A = P(1+i)^n.
Easy

2. Write down the compound decay (reducing-balance) formula for accumulated amount A.

Answer: A=P(1-i)^n — The compound decay formula is A = P(1-i)^n.
Medium

3. R8 000 is invested at a compound growth rate of 9% per year for 5 years. Calculate the accumulated amount, rounded to the nearest cent.

Answer: 12308.99 — A = 8000(1.09)^5. (1.09)^5 is approximately 1.5386239549, so A is approximately 8000 x 1.5386239549 = R12 308.99.
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