请问一下at least是大于等于还是大于??prep2里面有一题好似把这个词组当作是大于来讲,但是自我感觉是大于等于的意思吧??
Juan bought some paperback books that cost $8 each and some hardcover books that cost $25 each. If Juan bought more than
10 paperback books, how many hardcover books did he buy?
(1) The total cost of the hardcover books that Juan bought was at least $150.
(2) The total cost of all the books that Juan bought was less than $260.
就是这个题,选C但是按照我的理解是选E的,迷惑是不是这个词组的影响导致错选了?望战友们给予指点!!万分感谢!!!
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你的理解是对的,at least是等于或大于。
这道题,设p本paper books,h本hardover, (1)+(2)可得:8p+25h<260, p>10, h>=6(由条件1可得),所以可得h=6, 因为h=7时,取p=11, 8*11+25*7=263。
请楼主看清,这道题是求h,而不是求h和p.
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