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摸考的题

A store is open 6AM to 6PM everyday. If an average of 45 customers visited the store every hous between 7AM to 2PM, and the number of customers decreased by 3 people each hour after [U]the first hour the store was opened[/U], how many customers visited the store between 12PM and 1PM?
ANSWER: 39

划线部分是指早上6点还是7点?


An artist who needs to buy only paint and canvas finds that the cost of canvas has decreased by 40 percent and the cost of paint had decreased by 60 percent. [U]If paint previously accounted for 4 time as much of the expenses of painting as did canvas, [/U]by what percent did the total cost for paint and canvas decrease?

answer:56%

还是不懂划线部分的含义。

另外,PRINCETON 的摸考分数和真实分数之间要差多少。预谢了!
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