He accounting rate of return is calculated as: multiple choice the after-tax income divided by the total investment.

Answer and explanation:

The Annual Rate of Return or Yearly Rate of Return is the amount of money obtained in the course of an investment over one year. It is usually defined as a percentage and takes into account capital appreciation and dividend payments. The formula for calculating the annual rate of return is:

Annual Rate of Return = (EYP - BYP)/BYP X 100%

Where:

EYP = End of year price

BYP = Beginning of year price

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.'

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