2007 AMC 8 Problem 6
Attempt Problem 6 of the 2007 AMC 8 below, then check your answer against the professionally curated solution from LIVE by Po-Shen Loh. You can also try the full timed exam, view all 2007 AMC 8 solutions, or check the answer key.
All problems are used with official legal permission of the Mathematical Association of America (MAA).
6.
The average cost of a long-distance call in the USA in was cents per minute, and the average cost of a long-distance call in the USA in was cents per minute. Find the approximate percent decrease in the cost per minute of a long-distance call.
Answer: E
Small hint:
Percent decrease is decrease divided by the original amount.
Big hint:
The decrease is from cents to cents, so compare to
Solution:
The decrease in cost is cents per minute.
The percent decrease is , which is a little more than , so the closest answer is .
Thus, E is the correct answer.
Problem 6 in other years
- 1985 AMC 8
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