[計量] 請問一題
A phone call from City X to City Y costs $ 1.00 for the first 3 minutes
and $0.20 for each addtional minute. If r is an integer greater than 3,
a phone call r minutes long will cost how many ""dollars""?
A: (r+2)/5
很奇怪我算出來是(r+12)/5
請問大大解的出來答案嗎?
第二題 A sealed rectangular tank, which has inside dimensions of 30 by 40 by
50 centimeters, is partially full water.
choice A
The depth of the water when the is level and rests on one of its 30 by 50
centimeter face
choiceB
30 by 40 (前面依樣)
Ans:B
造怎樣知道他說的FACE是哪一面呀(如果沒看答案的話) 囧rz
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