首页
登录
职称英语
A researcher has found that the number of work hours needed to type in 5 words i
A researcher has found that the number of work hours needed to type in 5 words i
游客
2025-02-23
48
管理
问题
A researcher has found that the number of work hours needed to type in 5 words is directly proportional to the square root of s. If 2 work hours are needed to type in 2000 words, how many hours are needed to type in 4000 words?
选项
A、
B、
C、
D、
E、
答案
A
解析
第一句话中有比例表达“directly proportional to”。定位成比例的两个数量为the number of work hours needed to type in s words(输入s个单词所需要的工作时间)和the square root of s(
)。设工作时间为t,比例为k,则转化为表达式t=
。因为输入2000个单词需要2小时,所以2=
,解得k=
。则输入4000个单词需要的时间
选择A选项。
转载请注明原文地址:https://tihaiku.com/zcyy/3969767.html
相关试题推荐
Aresearcherhasfoundthatthenumberofworkhoursneededtotypein5wordsi
Ifn=pqr,wherep,q,andrarethreedifferentprimenumbers,howmanydiffere
f(2x)=2f(x)+1forallrealnumberx.Andf(0.5)=1QuantityA:f(2256)Quanti
78:S={1,3,5,7,…,397,399}SetSconsistsoftheoddnumbersfrom1to399,inc
Pointaandbareonthenumberline,thedistancebetweenaandbis7,ifa=
P1isapolygonwith6sides.P2isapolygonwithtwicethenumberofsidesof
Tomintendedtotypeaseven-digitnumber,butthetwo“3”hemeanttotypedid
Ifpandnareprimenumbers,p-n=4,and1.5<p/n<2,whatisthevalueofp?_____
A,B,C,D,Earefiverealnumbers.Ais50%greaterthanB.Bis20%lessthan
Onacertainnumberline,if8isdistanceof18fromn,and17ishedistanceo
随机试题
Despitethe______changesinthiscountry,manytoughissuesremainunsolved.A、ro
Somepeoplebelievethatinternationalsportcreatesgoodwillbetweenthena
ANewYorkTimes-CBSNewspollfoundthatalmost90percentofAmericansthi
GreenPowerYou’veinsulatedtheattic,installedtr
[originaltext]Hereisaquestionforyou.Thecustomerisalwaysright.Righ
患者,女,27岁,贵州某县人。因畏寒、低热1月、排米汤样尿3天,于1993年12
关于脑膜炎球菌,下列错误的是A、G-肾形双球菌B、可位于细胞内C、对干燥、室
根据《基础地理信息城市数据库建设规范》,下列数据中,不属于三维建筑模型数据组成部
硫酸镁中毒时应该A.尽快使患者平卧位 B.立刻注射尼可刹米 C.立刻注射肾上
(2018年真题)根据公司发展需要,某期货公司拟聘请独立董事,下列人员中,不得担
最新回复
(
0
)