【1.TheGDPofacertaincountryisgrowingataconstantrate.In1995theGDPwas125billiondollars,andin2003itwas155billiondollars.Ifthistrendcontinues,atwhatpercentageratewilltheGDPbegrowingin2010?2.Amanufacturercanproduced】

　　1.TheGDPofacertaincountryisgrowingataconstantrate.In1995theGDPwas125billiondollars,andin2003itwas155billiondollars.Ifthistrendcontinues,atwhatpercentageratewilltheGDPbegrowingin2010?

　　2.Amanufacturercanproducedigitalrecordersatacostof$50apiece.Itisestimatedthatiftherecordersaresoldforpdollarsapiece,consumerswillbuyq=120-precorderseachmonth.

　　a.expressthemanufacturer'sprofitPasafunctionofq.

　　b.Whatistheaveragerateofprofitobtainedasthelevelofproductionincreasesfromq=0toq=20?

　　c.atwhatrateisprofitchangingwhenq=20recordersareproduced?Istheprofitincreasingordecreasingatthislevelofproduction?