It takes Sara 1 hour to clean one house and 3 hours to clean one car. What is Sara's opportunity cost of cleaning 2 houses?

Iwant to be an engineer but cant do math for the life of me, but i also want to be a cop."what should i do"

Keshawn used to work for an it company in baltimore, but lost his job when his company decided to use workers in new delhi instead. this is an example of:

Robert black, regional manager for ford in texas and oklahoma, faced a dilemma. the ford f-150 pickup truck was the best-selling pickup ever, yet ford's headquarters in detroit had decided to introduce a completely redesigned f-150. how could mr. black sell both trucks at the same time? he still had "old" f-150s in stock. in his advertising, mr. black referred to the new f-150s as follows: "not a better f-150. just the only truck good enough to be the next f-150." this statement represents ford's of the new f-150.