【数学】
When Leo imported a certain item, he made a 7 percent importtax on the portion of the total value of the item in excess of $1,000. If the amount of the import tax that Leo paid was $87.50, what was thetotal value of the item?
A. $1,600
B. $1,850
C. $2,250
D. $2,400
E. $2,750
【数学】
参考答案：C
题目翻译：1000以外的部分交税7%, 交了$87.5，问一共多钱?
题目全解：设60000中x利率的是a，剩下的是b。87.5/7%=1250, 1250+1000=2250.
List Tconsists of 30 positive decimals, none of which is an integer, and the sum of the 30 decimals is S.The estimated sum of the 30 decimals, E, is defined as follows. Each decimal in T whose tenths digit is even is rounded up to the nearest integer, and each decimal in Twhose tenths digit is odd is rounded down to the nearest integer; E is the sum of the resulting integers. If -Iof the decimals in Thave a tenths digit that is even, which of the following is a possible value of E- S?
I. -16
II. 6
III. 10
(A) I only
(B) I and II only
(C) I and III only
(D) II and III only
(E) I, II, and III
答案：B
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