Interdependence and the Gains from Trade 747
22. Mark can produce 24 footballs or 48 basketballs in 8 hours. Maria can produce 64 basketballs in 8
hours. In order for Maria to have a comparative advantage producing basketballs, the number of
footballs she can produce in 8 hours has to be less than .
23. It takes Heather 1 hour to change the oil in the car and 20 minutes to do the dishes. It takes Zach
1.5 hours to change the oil in the car. For Zach to have a comparative advantage changing the oil
it must take him more than minutes to do the dishes.
24. Tom’s opportunity cost of mowing a lawn is 2 loads of laundry. Jen’s opportunity cost of
mowing a lawn is 1.5 loads of laundry. What is the range of prices for mowing a lawn at which
Tom and Jen could both benefit from trade?