返回列表 发帖

[求助]gwd 2-23

Q23:

AMOUNT OF BACTERIA PRESENT

Time

Amount

1:00 P.M.

10.0 grams

4:00 P.M.

x grams

7:00 P.M.

14.4 grams

Data for a certain biology experiment are given in the table above. If the amount of bacteria present increased by the same fraction during each of the two 3-hour periods shown, how many grams of bacteria were present at 4:00 P.M.?

A. 12.0

B. 12.1

C. 12.2

D. 12.3

E. 12.4

the correct amswer is A, but I think it is C. can somebody telll me why is A? thanks!

收藏 分享

(x-10)/10=(14.4-x)/x

TOP

返回列表

站长推荐 关闭


美国top10 MBA VIP申请服务

自2003年开始提供 MBA 申请服务以来,保持着90% 以上的成功率,其中Top10 MBA服务成功率更是高达95%


查看