作业帮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
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