The controller of Joyce Hospital relies on regression analysis to estimate medical supply costs, and uses the number of procedures as the cost driver. The estimated Intercept is 30,000 and the reported R-squared for the regression is .80. There were 400 procedures administered in January, and total medical supply costs for January amounted to $90,000. What is the estimated variable cost per procedure?

When used-car dealers signal the quality of a used car with a warranty, a. buyers believe the signal because the cost of a false signal is high b. it is not rational to believe the signal because some used-car dealers are crooked c. the demand for lemons is eliminated d. the price of a lemon rises above the price of a good used car because warranty costs on lemons are greater than warranty costs on good used cars