Aportfolio is composed of two stocks, a and b. stock a has a standard deviation of return of 20%, while stock b has a standard deviation of return of 15%. stock a comprises 60% of the portfolio, while stock b comprises 40% of the portfolio. if the variance of return on the portfolio is .030, the correlation coefficient between the returns on a and b is

Sarah salesrep is brand new to her job selling "lifetime" printers that never need replacement ink cartridges. the problem is that these printers cost ten times more than a regular printer, so it is difficult to get prospective buyers to understand the cost savings of buying it. to break through the barrier and begin making sales, sarah should use a analysis that highlights her printer's lower cost.

Your debit card is stolen, and you report it to your bank within two business days. how much money can you lose at most? a. $500 b. $25 c. $50 d. $150

One principle of usability testing is that it permeates product development. what does that mean?