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Prices are determined in a free market economy through the interactions of supply and demand in the Marketplace <span>where demand is the quantity of a product that buyers are willing to purchase according to a given price and supply is the amount of a product that sellers can vendor to customers at a given price.</span>
Answer: oil, coal, natural gas, and stone
Technician A & B both are correct.
Explanation:
A PCM stands for powertrain control module which is used in electronic fuel-injection system to control the working of fuel injectors. So, Technician A is correct. A TBI stands for throttle-body-injection which is used to inject the fuel into the air above the throttle plate of engine. That's why Technician B is also correct.
Fuel tank consists of electronic fuel pump. Computer control fuel pump relay and fuel-pressure regulator. Fuel pump speed is controlled by PCM. Technician B says that a TBI injector squirts fuel above the throttle into air at atmospheric pressure.
