When a company pays its bill from a plumber for previous services on account: group of answer choices its acid-test ratio always remains unchanged. its working capital decreases. its current ratio always remains unchanged. its debt to equity ratio always decreases.

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.'

i would say a penny hope it you

u = 30

continuing your method

= +

subtract from both sides

= - thus

= -

= ⇒ u = 30