Q23:
AMOUNT OF BACTERIA PRESENT
Time |
Amount |
|
10.0 grams |
|
x grams |
|
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
A. 12.0
B. 12.1
C. 12.2
D. 12.3
E. 12.4
答案是A, 可是我认为是C. 请哪位高人指点一下. 谢谢
告诉你每三个小时一次指数增长,开始是10克,3小时后是X克,6个小时后是
14.4克
那么如果设增长倍数是A,则:
X=10*A,
14.4=10*A^2
则通过第2个式子可以求出A,带入第一个式子,可以求出X...
欢迎光临 国际顶尖MBA申请交流平台--TOPWAY MBA (http://forum.topway.org/) | Powered by Discuz! 7.2 |