一道数学题，有点看不懂

woaihenglia · 发表于 2011-1-31 07:23:54

1:In the equation above, k,r,s,t, and v represent positive numbers. Multiplying which one of these numbers by 2 will reduce the value of n to1/2 of its present value?

后半句啥意思？翻译一下

选项分别是k,r,s,t,v

2: A certain money market account that had a balance of $48,000 during all of last month earned $360 in interest for the month. At what simple annual interest rate did the account earn interest last month?

A 7% B 7.5% C 8% D8.5% E 9%

这道题咋做。

sdcar2010 · 发表于 2011-1-31 08:19:42

n = f(k,r,s,t,v)

Replace x, wherein x is chosen from the group of k,r,s,t, and v, with 2*x, then the value of n, when x becomes 2x, would be cut in half.

2. 360/48000 *12 = 9%

一道数学题，有点看不懂

所属分类: GMAT考试

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