Why is the supply curve a vertical line

On january 1, eastern college received $1,350,000 from its students for the spring semester that it recorded in unearned tuition and fees. the term spans four months beginning on january 2 and the college spreads the revenue evenly over the months of the term. assuming the college prepares adjustments monthly, what amount of tuition revenue should the college recognize on february 28?

Brian has just finished college. he wants to set up a small business to make and sell fireworks. he registers his company and acquires a license from the government. he finds that most of his competitors are selling fireworks at an extremely low price. he would like to make more money, so he decides to innovate and develop better fireworks. he sells his fireworks at a higher price, and they are a huge hit with the customers. after a few years, he earns enough profit to set up a bigger fireworks factory that complies with the government’s health and safety regulations. he even starts exporting fireworks overseas. which type of economy does this scenario describe?

Bathlinks corporation has a debt to assets ratio of 73%. this tells the user of bathlinks’s financial statements that a. bathlinks is getting a 27% return on its assets. b. there is a risk that bathlinks cannot pay its debts as they come due. c. 73% of the assets are financed by the stockholders. d. based on this measure, the user should not invest in bathlinks.