GWD 24-18 & 24-31 已搜索过未讨论过

ny700 · 发表于 2007-11-14 11:08:00

GWD 24-18

The annual interest rate earned by an investment increased by 10 percent from last year to this year. If the annual interest rate earned by the investment this year was 1 percent, what was the annual interest rate last year?

A. 1% B. 1.1% C. 9.1% D. 10% E. 10.8%

GWD 24-31

Each side of a certain parallelogram has length 6. if the area of the parallelogram is 18. which of the following is the measure of one of its angles?

A. 30’ B. 45’ C. 60’ D. 90’ E.120’

crazecat123 · 发表于 2007-11-14 13:42:00

GWD 24-18
你确定题是这么说的吗？
x(1+10%)=1%
x=1% / (1.1)
x=0.9%

ny700 · 发表于 2007-11-18 00:21:00

Yes, I copied and pasted the question from GWD.

kevintown · 发表于 2008-7-30 10:29:00

原题有错

If the annual interest rate earned by the investment this year was 10 percent, what was the annual interest rate last year?

sarahzhensh · 发表于 2008-7-31 23:06:00

31题，是３０度吧？

ucicc · 发表于 2008-7-31 23:23:00

the height of the parallelogram is 3, thus A is correct

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