GRE数学题5求翻译和算法1.brand R coffee costs $3.25 per pound and bran

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GRE数学题5
求翻译和算法
1.brand R coffee costs $3.25 per pound and brand T coffee costs $2.50 per pound.The number of pounds of brand R in a mixture of brands R and T that costs $3.00 per pound与1.2 比较大小
2.the volum of block R is equal to the volum of block S.the total surface area of R 与the total surface area of S 比较大小
3.the height of a stack of cans if each can is size S except the can on the bottom of the stack,which is size T 与62.5 centimeters 比较大小
4.for each home in towm x ,the amount of property tax is p percent of the value of the home.the property tax on a home whose value is $45000 is $1200.the property tax on a home 与$1300比较大小
5

1.R牌咖啡3.25美元/pound,T牌咖啡2.5美元/pound.RT混合的3美元咖啡中R牌咖啡的pound数与 1.2 比大小.
只要按一定比例混合就可以达到3美元/p,因此不一定有多少R咖啡
所以选D不能确定.
2.R砖与S砖体积相等,R的表面积与S的表面积比大小
D不能确定
3.我看过这题原题,这题没说罐子的数量,所以选D
4.对X镇的每栋房子,要收p%*房子价值的财产税,价值为45000美元的房子要收1200美元的税,那么一栋房子的财产税与1300美元比大小.
这题没说房子价值吗?那还是选D...

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