AMC 8 1998 Problem 8

AMC8 1998 年第 8

表达式与运算☆☆☆☆
Problem A child's wading pool contains 200 gallons of water. If water evaporates at the rate of 0.5 gallons per day and no other water is added or removed, how many gallons of water will be in the pool after 30 days?
一个儿童戏水池装有 200 加仑水。如果水以每天 0.5 加仑的速度蒸发,且没有其他水的添加或移除,30 天后池中还有多少加仑水?
  1. A.140
  2. B.170
  3. C.185
  4. D.198.5
  5. E.199.85

正确答案 · Correct Answer

C

解析 · Solution

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