Caitlin and Shannon are starting a house painting service wh…

Caitlin and Shannon are starting a house painting service which involves scraping and painting walls. It takes Caitlin 20 minutes to scrape a standard sized wall and 30 minutes to paint the wall. It takes Shannon 10 minutes to scrape a standard wall and 20 minutes to paint the wall. Their paint service will be most productive if

In the 2 hours between classes, Craig can do one of three th…

In the 2 hours between classes, Craig can do one of three things, ranking them from most to least desirable as: (1) chat with friends, (2) study economics, or (3) eat lunch. Assuming that he can’t do any of these things simultaneously, his opportunity cost of chatting with friends is: