What are the name of the 7 contents

When used-car dealers signal the quality of a used car with a warranty, a. buyers believe the signal because the cost of a false signal is high b. it is not rational to believe the signal because some used-car dealers are crooked c. the demand for lemons is eliminated d. the price of a lemon rises above the price of a good used car because warranty costs on lemons are greater than warranty costs on good used cars

Most economists report the elasticity of demand asa. the absolute value of the actual number.b. a negative number, since price and quantity demanded move in opposite directions.c. a percentage, since both the numerator and denominator are percentages.d. a dollar amount, since we are measuring the change in price.

Weekly sales at nancy's restaurant total $ 84,000. labor required is 420 hours at a cost of $21,000. raw materials used amount to $40,000. what is the partial measure of productivity for labor hours?