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英文數學題(20點,急!)
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1) C.300 2)B.25% 3) 93% OR ＞93% 4)The cost price of each toy balls= $(180/600)=$0.3 The selling price of each toy ball (to get a profit percentage of at least 40% after all the balls are sold)=$(0.3．1.4 )=$0.42 5) The weight of Chris after joining a slimming programme=(71．0.8)kg= 56.8kg 56.8- [(66)．(1-20%)]=4 56.8- [(66)．0.8]=4 56.8-52.8=4 The possible percentage decrease in Anna's weight is 20%
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英文數學題(20點,急!)
發問:
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1) If 500 is decreased by 40%,what is the result? A. 250 B. 200 C. 300 D. 1002) How many per cent is 125 greater than 100? A. 20% B. 25% C. 12.5% D. 82%3) Write down a percentage with a value greater than 23/25.4) A hawker spent $180 to buy 600 toy balls. The hawker is going to sell the... 顯示更多 1) If 500 is decreased by 40%,what is the result? A. 250 B. 200 C. 300 D. 100 2) How many per cent is 125 greater than 100? A. 20% B. 25% C. 12.5% D. 82% 3) Write down a percentage with a value greater than 23/25. 4) A hawker spent $180 to buy 600 toy balls. The hawker is going to sell the balls. Suggest the selling price for each toy ball such that he can get a profit percentage of at least 40% after all the balls are sold. 5) The original weights of Chris and Anna were 71kg and 66kg respectively. After joining a slimming programme,both of them lost some weight. If Chris lost 20%of his weight,what is possible percentage decrease in Anna's weight so that the difference between their weights is less than 4kg?最佳解答:
1) C.300 2)B.25% 3) 93% OR ＞93% 4)The cost price of each toy balls= $(180/600)=$0.3 The selling price of each toy ball (to get a profit percentage of at least 40% after all the balls are sold)=$(0.3．1.4 )=$0.42 5) The weight of Chris after joining a slimming programme=(71．0.8)kg= 56.8kg 56.8- [(66)．(1-20%)]=4 56.8- [(66)．0.8]=4 56.8-52.8=4 The possible percentage decrease in Anna's weight is 20%
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