求一道GMAT数学题.Atacertainbookstore,theregularpriceofeachbookis20percentlessthanitslistprice.Ifduringasalethepriceofeachbookatthestorewas15percentlessthanitsregularprice,thenthepriceofabookduringthesa

　　求一道GMAT数学题.

　　Atacertainbookstore,theregularpriceofeachbookis20percentlessthanitslistprice.Ifduringasalethepriceofeachbookatthestorewas15percentlessthanitsregularprice,thenthepriceofabookduringthesalewaswhatpercentlessthanitslistprice?

　　A.30%

　　B.32%

　　C.35%

　　D.38%

　　E.40%

　　IsthemeasureofoneoftheinterioranglesofquadrilateralABCDequalto60degrees?

　　(1)TwooftheinterioranglesofABCDarerightangles.

　　(2)ThedegreemeasureofangleABCistwicethedegreemeasureofangleBCD.

　　A.Statement(1)ALONEissufficient,butstatement(2)aloneisnotsufficient.

　　B.Statement(2)ALONEissufficient,butstatement(1)aloneisnotsufficient.

　　C.BOTHstatementsTOGETHERaresufficient,butNEITHERstatementALONEissufficient.

　　D.EACHstatementALONEissufficient.

　　E.Statements(1)and(2)TOGETHERareNOTsufficient.

　　$10,000isdepositedinacertainaccountthatpaysrpercentannualinterestcompoundedannually,theamountD(t),indollars,thatthedepositwillgrowtointyearsisgivenbyD(t)=10,000{1+(r/100)}t.Whatamountwillthedepositgrowtoin3years?

　　(1)D(t)=11,000

　　(2)r=10

　　A.Statement(1)ALONEissufficient,butstatement(2)aloneisnotsufficient.

　　B.Statement(2)ALONEissufficient,butstatement(1)aloneisnotsufficient.

　　C.BOTHstatementsTOGETHERaresufficient,butNEITHERstatementALONEissufficient.

　　D.EACHstatementALONEissufficient.

　　E.Statements(1)and(2)TOGETHERareNOTsufficient.