Darren runs a barbershop with fixed costs equal to $40 per day and a total output of 10 haircuts per day. What is his weekly total fixed cost if he is open 6 days per week

$240

Explanation:

Darren runs Barber shop

His fixed costs daily is $40

The toal output per day is 10 haircuts

He is open 6 days in the week

Therefore weekly total fixed costs can be calculated as follows

= 40×6

= 240

Hence the weekly fixed cost is $240

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.'