$10,000 is deposited in a certain account that pays r percent annual interest compounded annually, the amount D(t), in dollars, that the deposit will grow to in t years is given by D(t) = 10,000 {1+(r/100)}^t.  What amount will the deposit grow to in 3 years?

(1)     D(t) = 11,000

(2)    r =10

A. Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.

B. Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.

C. BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.

D. EACH statement ALONE is sufficient.

E. Statements (1) and (2) TOGETHER are NOT sufficient.

我看以前的讨论说答案是Ｃ．我下载的ＴＴ３０套答案选Ｄ．

但我觉得是选Ｂ．

请ＮＮ解释一下！

B这个条件是足够的

如果条件(1)中是 D(1)=11,000那么就应该选D

可能答案错了吧，不知道别的版友怎么看这个问题

觉得 应该是D

因为根据条件A,

(1+r/100)^t=1.1,

其中t必须是整数, 而1.1除了可能是1.1的一次方,不可能是其他数的几次方.

... 就算t一定要是整数 r也不一定需要是整数阿

"1.1除了可能是1.1的一次方,不可能是其他数的几次方." 这个判断是缺少根据的