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.