A company is considering the purchase of a new sanding machine which will be in use for 5 years. Machines A and B both have a 5-year life, and zero salvage value at EOY 5. The cash flows above are net cash flows (i. e. revenue - operating expenses). Assume MARR = 10%, compounded annually. Use PW method to determine PW of Machine A and Machine B. Which machine should the company buy?

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.'

answer; personality;

answer///schedule;

answer blank(1).(2); sharpe;