The method of least squares was used to develop a cost equation to predict the cost of monthly equipment maintenance. the following computer output was received: intercept40,000slope20the driver used was the number of machine hours. using the cost formula for the equipment maintenance cost, what is the predicted cost of equipment maintenance for april, assuming that 8,000 machine hours will be logged in april?
a. $140,000
b. $200,000
c. $185,000
d. none of these choices are correct.

In the supply-and-demand schedule shown above, at the lowest price of $50, producers supply music players and consumers demand music players.

Stocks a, b, and c are similar in some respects: each has an expected return of 10% and a standard deviation of 25%. stocks a and b have returns that are independent of one another; i. e., their correlation coefficient, r, equals zero. stocks a and c have returns that are negatively correlated with one another; i. e., r is less than 0. portfolio ab is a portfolio with half of its money invested in stock a and half in stock b. portfolio ac is a portfolio with half of its money invested in stock a and half invested in stock c. which of the following statements is correct? a. portfolio ab has a standard deviation that is greater than 25%.b. portfolio ac has an expected return that is less than 10%.c. portfolio ac has a standard deviation that is less than 25%.d. portfolio ab has a standard deviation that is equal to 25%.e. portfolio ac has an expected return that is greater than 25%.

By 2020, automobile market analysts expect that the demand for electric autos will increase as buyers become more familiar with the technology. however, the costs of producing electric autos may increase because of higher costs for inputs (e. g., rare earth elements), or they may decrease as the manufacturers learn better assembly methods (i. e., learning by doing). what is the expected impact of these changes on the equilibrium price and quantity for electric autos?