A piece of machinery has a cost basis of $50,000. Its salvage value will be $5,000 after 9,000 hours of operation. With units-of-production depreciation, what is the allowable depreciation rate per hour? What is the book value after 4,000 hours of operation?

Depreciable rate= $5 per hour

Annual depreciation= $20,000

Explanation:

Giving the following information:

A piece of machinery has a cost basis of $50,000. Its salvage value will be $5,000 after 9,000 hours of operation.

Using the units of production method, we need to use the following formula for each year:

Annual depreciation= [(original cost - salvage value)/useful life of production in hours]*hours operated

Depreciable rate= [(50,000 - 5,000) / 9,000= $5 per hour

Annual depreciation= 5*4,000= $20,000

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.'