Martha runs a business that makes designer jeans. Each of the seamstresses she employs uses one of the sewing machines on the factory floor. In the short run, the seamstresses are afactor of production and the sewing machines are a fixed factor of production. The output of each seamstress is considered theproduct.

3. describe the purpose of the sec. (1-4 sentences. 2.0 points)

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%.

How do you know if two line segments are perpendicular?