Scientists express surprising confidence about the possibility of time travel. while they acknowledge that we don't possess the required technology, they do point out that it's just a question of engineering since it is clearly not impossible (hawking & mlodinow, 2008). if society did have access to technology that enabled travel to the future, how exactly would we use it?

Consider the following information on stocks a, b, c and their returns (in decimals) in each state: state prob. of state a b c boom 20% 0.27 0.22 0.16 good 45% 0.16 0.09 0.07 poor 25% 0.03 0 0.03 bust 10% -0.08 -0.04 -0.02 if your portfolio is invested 25% in a, 40% in b, and 35% in c, what is the standard deviation of the portfolio in percent? answer to two decimals, carry intermediate calcs. to at least four decimals.