推 smallwei12:謝謝你!!第一提跟第三題我都有懂!!太感恩了^^ 11/01 22:38
※ 引述《smallwei12 (如果不要有那天)》之銘言：
: p74#17.
: A certain disability plan pays monthly benefits of 60 perecnt of the first
: $2000 of monthly salary plus 40 percent of any portion in excees $2000-the
: total monthly benefit not to exceed $2500. What is the smallest monthly salary
: that will yield the maximum monthly benefit under this plan?
: (A)$5750
: *[0;31m(B)$5250
: (C)$4500
: (D)$3250
: (E)$2200
題目說明了每個月的benefit為:
2000*0.6 + (portion in excess $2000)*0.4 <= 2500
(benefit not to exceed $2500; 不超過就是小於等於的意思嗎? @@)
->1200 + (portion in excess $2000)*0.4 <= 2500
portion in excess $2000= $3250
所以salary = $2000 + $3250 = $5250 (B)
這題我算了兩次,跟下午的GWD一樣,我兩次算出來的答案一個是(B),一個是(D)
因為我忍不住就把式子列成: 1200 + (salary-2000)*0.4 <= 2500
(唉,我還是不懂為什麼這樣不行;我再考慮考慮...)
: #18.
: A cubical tank is filled with water to a level of 2 feet. If the waterin the
: tank occupies 18 cubic feet, to what fraction of its capacity is the tank
: filled with water?
: (A)1/9
: (B)2/9
: (C)1/3
: (D)1/2
: *[0;31m(E)2/3
不好意思我看題目看到頭暈...幫不了你...
: #19.
: For any number x ,「x」 denotes the least non-negative number y such that
: x+y is an integer. What is the value of 8.4 - 「8.4」?
: (A)-0.4
: (B)0
: (C)0.6
: *[0;31m(D)7.8
: (E)8.0
我想這題比較難懂的地方,
應該是"the least non-negative number such that x+y is an integer"吧:
「8.4」= 某個加上8.4之後會成為整數的數字的最小值非負數 = 0.6
所以8.4 - 「8.4」= 8.4 - 0.6 = 7.8 (D)
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◆ From: 61.66.187.115
※ 編輯: a1985526 來自: 61.66.187.115 (11/01 22:21)
※ 編輯: a1985526 來自: 61.66.187.115 (11/01 22:24)