Aportfolio has 30% of its value in ibm shares and the rest in microsoft (msft). the volatility of ibm and msft are 35% and 30%, respectively, and the correlation between ibm and msft is 0.5. what is the standard deviation of the portfolio excel?

The standard deviation of the portfolio is 26.15%

Explanation:

First the formula of variance of a portfolio is used.

Take the square root of variance to get standard deviation.

(0.3)^2 × (0.35)^2 + (0.7)^2 × (0.3)^2 + 2 × 0.3 × 0.7 × 0.35 × 0.3 × 0.3 = 0.068355

Taking square root of 0.068355 to get standard deviation that is 26.15%

ans.

heterothermic organisms include those organisms that can switch between homeothermic (having body temperature higher than environment) and poikilothermic (having variation in internal body temperature) strategies.

some migratory birds show heterothermy as they decrease their metabolic rate during cold nights to keep their body temperature low. drop in metabolic rate allows increase in production efficiency of birds that reduces the internal body temperature to make it equal to external cold temperature during cold nights.

thus, the correct answer is 'birds allow their temperature drop in order to increase their production efficiency.'

i think the answer is a. science center.