首页
登录
职称英语
During a one-year study, biologists observed the number of fish in a certain pon
During a one-year study, biologists observed the number of fish in a certain pon
游客
2025-02-24
25
管理
问题
During a one-year study, biologists observed the number of fish in a certain pond as well as the percent of the fish that were catfish. At the beginning of the year, there were 300 fish in the pond, of which 15 percent were catfish; and at the end of the year, there were 400 fish in the pond, of which 10 percent were catfish. From the beginning of the year to the end of the year, the number of catfish in the pond
选项
A、decreased by more than 5%
B、decreased by 5%
C、did not change
D、increased by 5%
E、increased by more than 5%
答案
A
解析
The answer choices indicate that the question is asking about the percent change in the number of catfish. The number of catfish in the pond at the beginning of the year was 15% of 300, or(0.15)(300), which is 45. The number of catfish in the pond at the end of the year was 10% of 400, or(0.10)(400), which is 40. Thus, the number of catfish decreased by 5.
The percent by which the number of catfish decreased from the beginning of the year to the end of the year is
Thus, the number of catfish decreased by about 11%. This is a decrease of more than 5%, so the correct answer is Choice A.
转载请注明原文地址:https://tihaiku.com/zcyy/3970308.html
相关试题推荐
Whentheaverageofalistofcoursegradesismultipliedbythenumberofcours
If55percentofthepeoplewhopurchaseacertainproductarefemale,whatist
Iftheratioofthenumberofmentothenumberofwomenonacommitteeof20me
[img]2014m9x/ct_egreqj_egreqtbz1_0030_20148[/img]Onthenumberlineshownabove
Ofthe700membersofacertainorganization,120arelawyers.Twomembersofth
ENERGYUSEDPERMETERVERSUSSPEEDDURINGRUNNINGA
ENERGYUSEDPERMETERVERSUSSPEEDDURINGRUNNINGA
Ofthepeopleinacertainsurvey,58percentwereatmost40yearsoldand70p
Ifa
ListKconsistsofthenumbers-10,-5,0,5,and10.Whichofthefollowinglis
随机试题
Whentherearesmallkidsaround,itisnecessarytokeepmedicine______.A、out
[originaltext]I’msorry,butIhavehadadatewithotherstonight.[/originalte
应用SWOT矩阵分析法进行数字出版产品分析时,需要做好( )等工作。A.分析产
某国2011年第一季度的国际收支状况是:贸易账户差额为逆差583亿美元,劳务账户
不能用于鉴别白色水肿与白斑的特征是A.白色水肿边界不清 B.白色水肿质地柔软
下列选项中哪项不属于《专利法》所称的执行本单位的任务所完成的职务发明创造:A.在
对经营者激励的形式多种多样,主要有年薪制、薪金与奖金相结合、股票奖励、股票期权等
下列有关财务报表审计的说法中,错误的是()。A.审计以绝对保证的方式提高财
月度终了,企业应当将当月应交未交或多交的增值税自“应交增值税”明细科目转入“未交
消瘦案例: 简要病史:患者,男性,40岁,消瘦伴多尿2个月。
最新回复
(
0
)