Advanced MathEasyReading an exponential model at a given time
Advanced Math practice question
The number of leaves on a young plant w weeks after planting is modelled by L(w) = 4·3ʷ. How many leaves does the model give after 2 weeks?
- A. 36Correct
- B. 24
- C. 12
- D. 48
Answer: A. 36
4 × 3² = 4 × 9 = 36.
Why the other answers are wrong
- B. 24
- 24 is 4 × 3 × 2, multiplying by 2 instead of raising to the power 2.
- C. 12
- 12 is the value after 1 week.
- D. 48
- 48 is 4 × 12, doubling the week-1 value instead of tripling.
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