An investor will pay $2,318.63 for an n-year $2,000 par bond with a coupon rate of 10% compounded semiannually or he will pay $2,531.05 for an nyear $2,000 par bond with a coupon rate of 11% compounded semiannually. Assuming that the investor gets the same yield on the two bonds, find this yield rate expressed as a nominal rate convertible two times per year. Also find n.

28 years

Explanation:

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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.'