71.Profit-maximizingfirmsinacompetitivemarketproduceanoutputlevelwhere a.marginalcostequalsmarginalrevenue. b.marginalcostequalsaveragetotalcost. c.marginalrevenueisincreasing. d.priceislessthanmarginalrevenue. 72.Aprofit-maximizingfirminacompetitivemarketwillalwaysmakemarginaladjustmentstoproductionaslongas a.averagerevenueisgreaterthanaveragetotalcost. b.averagerevenueisequaltomarginalcost. c.marginalcostisgreaterthanaveragetotalcost. d.priceisaboveorbelowmarginalcost. 73.Whenpriceisgreaterthanmarginalcostforafirminacompetitivemarket, a.marginalcostmustbefalling. b.thefirmmustbeminimizingitslosses. c.thereareopportunitiestoincreaseprofitbyincreasingproduction. d.thefirmshoulddecreaseoutputtomaximizeprofit. 74.Profit-maximizingfirmsenteracompetitivemarketwhenexistingfirmsinthatmarkethave a.totalrevenuesthatexceedfixedcosts. b.totalrevenuesthatexceedtotalvariablecosts. c.averagetotalcoststhatexceedaveragerevenue. d.averagetotalcostslessthanmarketprice. 75.Ifaprofit-maximizingfirminacompetitivemarketdiscoversthat,atitscurrentlevelofproduction,priceisgreaterthanmarginalcost,itshould a.shutdown. b.reduceitsoutputbutcontinueoperating. c.continuetoproduceatthecurrentlevels. d.increaseitsoutput. 76.Foranygivenprice,afirminacompetitivemarketwillmaximizeprofitbyselectingthelevelofoutputatwhichpriceintersectsthe a.averagetotalcostcurve. b.averagevariablecostcurve. c.marginalcostcurve. d.marginalrevenuecurve. 77.Bycomparingmarginalrevenueandmarginalcost,afirminacompetitivemarketisabletoadjustproductiontothelevelthatachievesitsobjective,whichweassumetobe a.maximizingtotalrevenue. b.maximizingprofit. c.minimizingvariablecost. d.minimizingaveragetotalcost. 78.Aprofit-maximizingfirminacompetitivemarketiscurrentlyproducing200unitsofoutput.Ithasaveragerevenueof$9andaveragetotalcostof$7.Itfollowsthatthefirm’s a.averagetotalcostcurveintersectsthemarginalcostcurveatanoutputleveloflessthan200units. b.averagevariablecostcurveintersectsthemarginalcostcurveatanoutputleveloflessthan200units. c.profitis$400. d.Alloftheabovearecorrect. 79.Ifacompetitivefirmiscurrentlyproducingalevelofoutputatwhichprofitisnotmaximized,thenitmustbetruethat a.marginalrevenueexceedsmarginalcost. b.marginalcostexceedsmarginalrevenue. c.totalcostexceedstotalrevenue. d.Noneoftheaboveiscorrect. 80.Susanquitherjobasateacher,whichpaidher$36,000peryear,inordertostartherowncateringbusiness.Shespent$12,000ofhersavings,whichhadbeenearning10percentinterestperyear,onequipmentforherbusiness.Shealsoborrowed$12,000fromherbankat10percentinterest,whichshealsospentonequipment.Forthepastseveralmonthsshehasspent$1,000permonthoningredientsandothervariablecosts.Alsoforthepastseveralmonthsshehasearned$4,500inmonthlyrevenue.Intheshortrun,Susanshould a.shutdownherbusiness,andinthelongrunsheshouldexittheindustry. b.continuetooperateherbusiness,butinthelongrunsheshouldexittheindustry. c.continuetooperateherbusiness,butinthelongrunshewillprobablyfacecompetitionfromnewlyenteringfirms. d.continuetooperateherbusiness,andsheisalsoinlong-runequilibrium.