问一个英语的数学问题:(请帮个忙~)下补充~The cost of similar bottles of milk is proportional to the volume.A bottle which has a radius of 36mm costs 75c.Question:a.What is the price (to the nearest cent)of the bottle with a radiu
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![问一个英语的数学问题:(请帮个忙~)下补充~The cost of similar bottles of milk is proportional to the volume.A bottle which has a radius of 36mm costs 75c.Question:a.What is the price (to the nearest cent)of the bottle with a radiu](/uploads/image/z/10177160-32-0.jpg?t=%E9%97%AE%E4%B8%80%E4%B8%AA%E8%8B%B1%E8%AF%AD%E7%9A%84%E6%95%B0%E5%AD%A6%E9%97%AE%E9%A2%98%EF%BC%9A%EF%BC%88%E8%AF%B7%E5%B8%AE%E4%B8%AA%E5%BF%99%7E%EF%BC%89%E4%B8%8B%E8%A1%A5%E5%85%85%7EThe+cost+of+similar+bottles+of+milk+is+proportional+to+the+volume.A+bottle+which+has+a+radius+of+36mm+costs+75c.Question%3Aa.What+is+the+price+%28to+the+nearest+cent%29of+the+bottle+with+a+radiu)
问一个英语的数学问题:(请帮个忙~)下补充~The cost of similar bottles of milk is proportional to the volume.A bottle which has a radius of 36mm costs 75c.Question:a.What is the price (to the nearest cent)of the bottle with a radiu
问一个英语的数学问题:(请帮个忙~)下补充~
The cost of similar bottles of milk is proportional to the volume.A bottle which has a radius of 36mm costs 75c.Question:a.What is the price (to the nearest cent)of the bottle with a radius 45mm?b.What is the radius (to 3s.f.)of the bottle which costs $1?
问一个英语的数学问题:(请帮个忙~)下补充~The cost of similar bottles of milk is proportional to the volume.A bottle which has a radius of 36mm costs 75c.Question:a.What is the price (to the nearest cent)of the bottle with a radiu
还挺难.用汉语说吧.价格于体积成比例,也就是与半径的三次方成比例.
半径比是1.25,体积比是1.9多.
b问题你应该会了吧
1) 75 divided by 36 then times 45 is 93.75c
2) 1 dollar is equal to 100 cents
75 divided by 36 is 2.083
100 divided by 2.083 is 48mm
体积和价格成比例,题目出的有点问题,应该是默认等高
a*75/36^2=a*X/45^2 a是系数可约掉,X即为45半径瓶的钱
a*75/18^2=a*100/R^2
R为1美元瓶子的半径,记得保留三位有效数字