GWD-30-M-10

Q10:

$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

Key is D.

可是（1）怎么可以算得出来呢？因为有两个未知数，t和r，但是只有一个等式呀

对呀，1应该有问题吧，如果是直接给答案，应该是D（3）＝11000才对呀。