2014年5月SAT真题（Math部分）

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1、Unauthorizedcopyingorreuseof4DDDDanypartofthispageisillegal.DDDD4SECTION4Time-25minutes18QuestionsTurntoSection4(page5)ofyouranswersheettoanswerthequestionsinthissection.Directions:Thissectioncontainstwotypesofquestions.Youhave25minutestocompletebothtypes.Forq

2、uestions1-8,solveeachproblemanddecidewhichisthebestofthechoicesgiven.Fillinthecorrespondingcircleontheanswersheet.Youmayuseanyavailablespaceforscratchwork.I.Theuseofacalculatorispermitted.2.Allnumbersusedarerealnumbers.r3.Figuresthataccompanyproblemsinthistest

3、areintendedtoprovideinformationusefulinsolvingtheproblems.TheyaredrawnasaccuratelyaspossibleEXCEPTwhenitisstatedinaspecificproblemthatthefigureisnotdrawntoscale.Allfigureslieinaplaneunlessotherwiseindicated.4.Unlessotherwisespecified,thedomainofanyfunctionfisa

4、ssumedtobethesetofallrealnumbersxfo_rwhichJ{x)isarealnumber.(EWhEJhGCJw~J"b~b(aA=nr2lC=2nrA=fwA=2_bhV=(whV=nr2hc2=a2+[JlSpecialRightTrianglesThenumberofdegreesofarcinacircleis360.Thesumofthemeasuresindegreesoftheanglesofatriangleis180.1.Ericplantedatreethatwas

5、30inchestall,anditgrew2.Ifp-3isaneveninteger,thenpcouldbewhichofataconstantrate6f20inchesperyearforthenextthefollowing?10years.Whichofthefollowingrepresentstheheight,ininches,ofthetreetyearsafteritwasplanted,forall(A)-2valuesoftbetw.een0and10?(B)0(C)1(A)30+20t

6、(D)2(B)50+t(E)4(C)50+lOt(D)600+t(E)600tIGOONTOTHENEXTPAGE>-12-Unauthorizedcopyingorreuseof4DDDDanypartofthispageisillegal.DDDD4JANE'STELEVISIONVIEWINGPERDAY4.Inthexy-plane,thepoint(3,0)isthecenterofacirclethathasaradiusof3.WhichofthefollowingisNOTMondayc:JCJc:

7、Japointonthecircle?(A)(6,0)TuesdayCJCJ(B)(6,-3)(C)(3,3)WednesdayCJCJCJ(D)(3,-3)(E)(0,0)Thursdayc:JFridayc:Jc:Jc:Jc:JSaturday?Sunday?{:J=1hour3.ThepictogramaboveshowsthenumberofhoursJanewatchedtelevisioneachdayoverthefirst5daysf(~)=2x-6inaweek.Theaverage(arithm

8、eticmean)number2ofhoursoftelevisionthatJanewatchedperdayforg(x)=x-3x-4the7daysis3.WhichofthefollowingarepossiblenumbersofhoursoftelevisionthatJanewatched5.Thefunctionsfandgaredefin