唔該幫我啦～！比埋條式我同答案我～ｔｈｘ～＾＾
１．一部計算機的定價是故１５０元，並以２５％的折扣賣出．要折扣
２．一個籃球的標價是＄２６０，並以＄２２１賣出．它的折扣％是．．．．
３．小美以３０％的折扣買了一本課本．如果她節省了＄５７求該課本的標價．
４．小明存了＄５０００進銀行，利息以單息計算．若他於２．５年後得到本利和美
＄５６８７５，年利率是多少．
數學～急．．．．．．．．．．．．．．．．．．
2007-02-25 4:20 am
回答 (3)
2007-03-12 3:13 am
✔ 最佳答案
1. 150 x (100% - 25% ) = 112.52. (260 - 221)/260 x 100% = 15%
3. 57 / 30% = 190
4. 5000 x 2.5 x p = 56875 - 5000
p = 4.15
2007-02-25 4:30 am
1. 150 x (100% - 25% ) = 112.5
2. (260 - 221)/260 x 100% = 15%
3. 57 / 30% = 190
4. 5000 x 2.5 x p = 56875 - 5000
p = 4.15
所以年利率是 4.15%
2. (260 - 221)/260 x 100% = 15%
3. 57 / 30% = 190
4. 5000 x 2.5 x p = 56875 - 5000
p = 4.15
所以年利率是 4.15%
2007-02-25 4:28 am
1. 150X(1-２５％)= 112.5
2. (221-260)/260X100％=-15％
Therefore15％off
3. 57/30％=190
2. (221-260)/260X100％=-15％
Therefore15％off
3. 57/30％=190
收錄日期: 2021-04-12 23:22:51
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070224000051KK04845