AMC 8 2004 Problem 7
AMC8 2004 年第 7 题
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Problem An athlete's target heart rate, in beats per minute, is 80% of the theoretical maximum heart rate. The maximum heart rate is found by subtracting the athlete's age, in years, from $220$. To the nearest whole number, what is the target heart rate of an athlete who is 26 years old?
运动员的目标心率（以每分钟心跳数为单位）是理论最大心率的 80％．将 220 减去运动员的年龄（以年为单位），即可得到理论最大心率。则一名 26 岁的运动员的目标心率是多少（精确到整数）？
- A.134
- B.155
- C.176
- D.194
- E.243
正确答案 · Correct Answer
B
解析 · Solution
解析整理中
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