B Most cars decrease in value after you buy it while other cars if deemed Classic increase in value after a certain time A new Porsche that costs 195 000 decreases by about 20 per year while a 1970 Classic Mustang presently worth 11 500 increases by about 7 per year a How long with it take for the value of the Mustang to be equal to the value of the Porsche round to one decimal b What will the value of both cars be