A generous benefactor to a local symphony plans to make a one-time endowment that would provide the ballet with $150,000 per year into perpetuity. The rate of interest is expected to be 6 percent for all future time periods. How large must the endowment be?

The right answer is "$2,500,000".

Explanation:

The given values are:

Interest rate,

= 6%

i.e.,

= 0.06

Perpetuity per year

= $150,000

Now,

The present value will be:

=

On substituting the estimated values, we get

=

= ($)

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.'

a

explanation: