Auto Corp., a large auto parts store, did an experiment to see whether it was faster to have one person work on each car repair or have a team of people work together on a repair. It found that each employee, working independently, could do one to three auto repairs per day. However, when one person removed the old part, another person prepared the new part, and a third person installed the new part, they were able to complete up to twenty repairs per day. This scenario demonstrates that .

Suppose someone wants to sell a piece of land for cash. the selling of a piece of land represents turning econ

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%.

What is the cause of smoky exhaust?