Consider the following two mutually exclusive projects: Year Cash Flow (A) Cash Flow (B) 0 –$ 364,000 –$ 52,000 1 46,000 25,000 2 68,000 22,000 3 68,000 21,500 4 458,000 17,500 Whichever project you choose, if any, you require a return of 11 percent on your investment. a-1. What is the payback period for each project? (Do not round intermediate calculations and round your answers to 2 decimal places, e. g., 32.16.)

Project A = 3.40years

Project B = 2.23years

Explanation:

The solution is given in the file attached below

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.'