Suppose that real gdp per capita in italy is $33,500. if real gdp per capita is growing at a rate of 1.6% per year, how many years will it take for real gdp per capita to reach $67,000?

45 years

Explanation:

The computation of the number of years to reach the $67,000 real GDP per capita is shown below:

Here we use the rule of 72 that doubles the real gdp per capita

= 72 ÷ growth rate

= 72 ÷ 1.6%

= 45 years

In 45 years the real GDP per capita would be doubled that means from $33,500 to $67,000 it would be reached in 45 years

We simply applied the above formula so that the correct value could come

And, the same is to be considered  

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.'