5
Answer: ASet 6: Exponential Functions (Advanced)
Explanation
A forest fire spreads exponentially. It covers 10 acres on day 1, 40 acres on day 2. How many acres on day 4?
A.✓ Correct
640 acres
B.
160 acres
C.
320 acres
D.
80 acres
Detailed Explanation
Choice A is correct. Choice A is the correct answer. Find the pattern and extend. 1. Growth Factor: per day. 2. Formula: where is the day. 3. Day 4: acres. Strategic Tip: From day to day, multiply by the growth factor. Choice B is incorrect because this is day 3: . Choice C is incorrect because this doesn't match the pattern. Choice D is incorrect because this underestimates growth.
Key Steps:
•
The correct answer is 640 acres
Why others are wrong:
B: Choice B is incorrect and may result from a calculation error.
C: Choice C is incorrect and may result from a calculation error.
D: Choice D is incorrect and may result from a calculation error.
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