Kirstin is thinking about opening an italian restaurant and needs to buy a dough maker. machine a has fixed costs of $300 and variable costs of $1/pound. machine b has fixed costs of $1000 and variable costs of $0.30/pound. what is the crossover point? for 500 pounds of dough, which machine is better? 1000; machine a 1857; machine a 1000; machine b 538; machine b 538; machine a

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%.