Which model should be purchased in Problem $9\mathrm{.}30,$ if there is a budget constraint of $($ a $)$ $$280000?$ $$230000?($c$)$$$210000?$ Ans. $($a$)$E;$($b$)$D; $($c$)$C

$($b$)$

$9\mathrm{.}32$ HowwouldtheresultofProblem$9\mathrm{.}30($b$)$changeiftheMARRis$($a$)9\%?($b$)$lo$\%?($c$)12\%?($d$)15\%?($e$)20\%?$ Ans. $($a$)-($e$)$nochange