In a research study, the initial number of birds was 4. Each month, the number of birds doubled from the previous month's count. What will be the total number of birds after 8 months?

Answer Choices

Correct answer marked below

2^4

4^2

4*(2^8)

Correct

4*(2^7)

4*(8^2)

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Explanation

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Official Explanation

Official

Initially, the number of birds is N = 4. After the first month, the number of birds becomes N1 = 4 x 2 = 8. After the second month, the count is N2 =…

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Comments

andreaJan 9, 2024

thanks for posting

RonAug 24, 2024

thanks for the answer

What this question tests

What it tests

Your ability to spot and extend arithmetic and geometric sequences and work with recursive definitions.

Common trap

Off-by-one errors in indexing (a₀ vs a₁) or confusing an arithmetic difference with a geometric ratio.