有GWD题目的人 请帮帮忙 感谢

ken92

27-Q35:

The interior of a rectangular carton is designed by a certain manufacturer to have a volume of x cubic feet and a ratio of length to width to height of 3 : 2 : 2.  In terms of x, which of the following equals the height of the carton, in feet?

 

Ans:(2x/3)^(1/3)

 

看不懂要求什么??

26-Q25:

图片显示不出来
                有GWD题目的人请看第26回
                谢谢

The graph above shows the combined revenue, in billions of dollars, of a chain of food stores for each year over a four-year period.  In 1994 a certain store’s revenue accounted for 2.0 percent of the combined revenue for that year, and in the 1995 the same store accounted for 2.3 percent of the combined revenue for that year.  What was the approximate percent increase in revenue for this store from 1994 to 1995 ?

 

A.        0.3%

B.        15.0%

C.        25.0%

D.       30.4%

E.        43.8%

Ans: E
                

 

为啥不是C呢??

 

23-Q34:

请看GWD第23回的图形
            谢谢

In the figure, each side of square ABCD has length 1, the length of line segment CE is 1, and the length of line segment BE is equal to the length of line segment DE.  What is the area of the triangular region BCE?

 

A.      1/3

B.      (Ö2)/4

C.      1/2

D.     (Ö2)/2

E.      3/4

ANS: B

 

不会算耶??

superhe1981

27-Q35:
                

是求用x表示高

因为比是3：2：2 设a, 那么具体就是，3a , 2a, 2a . x=3a*2a*2a  ,x=12a^3  , a= (x/12)^1/3 ,具体的高是2a, 所以得(2x/3)^(1/3)

是求用x表示高

因为比是3：2：2 设a, 那么具体就是，3a , 2a, 2a . x=3a*2a*2a  ,x=12a^3  , a= (x/12)^1/3 ,具体的高是2a, 所以得(2x/3)^(1/3)

superhe1981

23-Q34

根据题意，BE=DE,则E点在过A,C两点的直线上。因为看不到图，所以我判断E或者在AC中间（因为AC=根号2），或者在AC的向C的延长线上。但是都不影响，因为，高和底边长都一样。该高是正方形对角线的一半 根号2/2 ，底边为1， 所以面积 是根号2/4