题目

The cost to park a car in a certain parking garage is $8.00 for up to 2 hours of parking and $1.75 for each hour in excess of 2 hours. What is the average (arithmetic mean) cost per hour to park a car in the parking garage for 9 hours?


选项

A.

$1.09

B.

$1.67

C.

$2.25

D.

$2.37

E.

$2.50

解析

9小时停车的总费用=前2小时8美元,剩余(9-2)小时每小时1.75美元= 8 + 7×1.75 = 20.25美元 因此,停车的**平均价格**= 20.25÷9 = 2.25美元 选项C是正确答案。
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