sat数学试题.docx
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sat数学试题
SAT数学题分成了选择题和计算题,相对于SAT数学选择题,答案还有一些提示的作用,SAT数学计算题就需要大家自己进行解答了。
下面为大家推荐的这道SAT数学计算题是非常典型的代数方程类的题目,大家一起来看看吧。
Whatvalueof satisfiesbothoftheequationsabove?
Thecorrectansweris1/2or.5
Explanation
Difficulty:
Medium
Since ,thevalueof iseither or .
OR
Thetwovaluesof thatsatisfythefirstequationare and .
Since ,thevalueof iseither or .
OR
Thetwovaluesof thatsatisfythesecondequationare and .
Youareaskedtofindthevalueof thatsatisfiesbothequations.Thatvalueis .Theanswercanbeenteredinthegridas or .
下面是两道SAT数学练习题,都是选择题,后面附有答案及其解析。
SAT数学练习题可以让大家更快更好的了解SAT数学考试的出题方式以及应对方式。
下面是详细内容,我们一起来看一下这些SAT数学练习题的吧。
1、ConeAhasvolume24.Whenitsradiusandheightaremultipliedbythesamefactor,thecone’ssurfaceareadoubles.WhatisConeA’snewvolume?
(A)
(B)48
(C)
(D)96
(E)Notenoughinformationtotell
2、Arectanglestandssothatits6inchsideliesflatagainsttheground.Iftherectangleisrotatedaroundtheaxisofoneofitstwo4inchsides,whatisthevolumeoftheresultingcylinder?
(A)24Ï€
(B)36Ï€
(C)64Ï€
(D)96Ï€
(D)144Ï€
Answers
1、C
Theformulaforacone’ssurfaceareaisπr2+πrl.Acone’svolumeis1/3πr2h.Soifthedimensionsofaconearemultipliedbythesamefactor,a,
thenitssurfaceareamultipliesbythesquareofthatfactor.Ifthedimensionsofaconearemultipliedbythesamefactor,thevolumebecomesmultipliedbythecubeofthatfactor:
Ingeneral,forsolids,ifeachdimensionofaconeismultipliedbythesamefactor,thesolid’ssurfaceareaismultipliedbythesquareofthatfactor,anditsvolumeincreasesbythecubeofthatfactor.IfthesurfaceareaofConeAdoubles,itsdimensionsaremultipliedbyafactorofThus,thecone’svolumeismultipliedbyafactorofConeA’snewvolumeis
2、E
Iftherectangleisrotatedaboutasideoflength4,thentheheightofthecylinderwillbe4andtheradiuswillbe6.
Onceyouvisualizethecylinder,youcanpluginthevaluesforthevolumeofacylinder:
一道SAT数学题(抛物线)
天道留学 时间:
2011-08-26
点击:
26次
下面是一道关于抛物线的SAT数学题及其解法的内容,非常详细。
SAT题中,抛物线是必考的一类,虽然中学课程都有所涉及,还是相对比较抽象,尤其是在理解SAT数学题的表达方式上。
下面我们来看看这道关于抛物线的SAT数学题吧。
ReadthefollowingSATtestquestionandthenclickonabuttontoselectyouranswer.
Thequadraticfunctionisgraphedinthe-planeabove.If forallvaluesof,whichofthefollowingcouldbethecoordinatesofpoint?
AnswerChoices
(A)
(B)
(C)
(D)
(E)
ThecorrectanswerisC
Explanation
Thefactthatforallvaluesofmeansthatthepointisthemaximumofthequadraticfunction,somustbethevertexoftheparabola.Theparabolaintersectsthe-axisatthepointsand,somustbehalfwaybetweenand.Therefore,.Ofthechoices,theonlyonewith-coordinateequaltois.Therefore,couldbethecoordinatesofpoint.
1.Whatisthelengthofthelinesegmentinthex-yplanewithendpointsat(-2,-2)and(2,3)?
A.3
B.√31
C.√41
D.7
E.9
CorrectAnswer:
C
解析:
Sketchadiagramandcalculatethedistance(hypotenuseofarighttriangle)usingPythagorastheorem.
Verticalheightoftriangle=5;horizontalside=4;hypotenuse=√(25+16)=√41
2.nisanintegerchosenatrandomfromtheset{5,7,9,11}
pischosenatrandomfromtheset{2,6,10,14,18}
Whatistheprobabilitythatn+p=23?
A.0.1
B.0.2
C.0.25
D.0.3
E.0.4
CorrectAnswer:
A
解析:
Eachoftheintegersinthefirstsetcouldbecombinedwithanyfromthesecondset,givingatotalof4x5=20possiblepairs.Ofthesethecombinationsthatcouldgiveasumof23are(5+18),and(9+14).Thismeansthattheprobabilityofgettingasumof23is2/20=1/10
3.Adressonsaleinashopismarkedat$D.Duringthediscountsaleitspriceisreducedby15%.Staffareallowedafurther10%reductiononthediscountedprice.IfastaffmemberbuysthedresswhatwillshehavetopayintermsofD?
A.0.75D
B.0.76D
C.0.765D
D.0.775D
E.0.805D
CorrectAnswer:
C
解析:
Ifthepriceisreducedby15%,thenthenewpricewillbe0.85D.Ifthisnewpriceisfurtherreducedby10%,thediscountedpricewillbe0.9x0.85D=0.765D
4.Allthedotsinthearrayare2unitsapartverticallyandhorizontally.Whatisthelengthofthelongestlinesegmentthatcanbedrawnjoininganytwopointsinthearraywithoutpassingthroughanyotherpoint?
A.2
B.2√2
C.3
D.√10
E.√20
CorrectAnswer:
E
解析:
Thelongestlinesegmentthatcanbedrawnwithoutpassingthroughanydotsotherthanthoseatthebeginningandendofthesegment,suchalinecouldgofromthemiddledotinthe