Davy's doggie daycare rents a warehouse and field for $2,000 a month to house its boarding pooches. farmer fred owns the property, he used to use it for farming and made $3,000 a month, but has since retired. what is the cost of the warehouse and field to davy?

Because Davy's warehouse is an explicit cost, the cost of the warehouse and field o Davy is $2,000. An explicit cost is a direct cost to someone during the time he ran the business. Each month Davy would rent the warehouse and field for $2,000 so that someone could run a business making it an explicit cost. 

The correct answer is "a reaction that releases energy into the environment".

On the basis of energy, the chemical reactions can be of two types exothermic reaction and endothermic reaction.

Exothermic reactions are those reactions in which energy is released in the environment. The energy might release in the form of heat, electricity, sound or light.

For example, the burning of fossil fuels, neutralization reaction, nuclear fission, respiration, the reaction between water and calcium chloride etc.

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In contrasts, endothermic reactions are those in which heat is supplied to the system.

For example, →