Which of the following is an incorrect statement about production possibilities frontiers?

Using the midpoints formula, what would be price elasticity of demand for a gallbladder operation if the number of operations fell from 6,000 to 4,000 per week after its price increased from $6,000 to $10,000?

Consider the market for beach front properties. The demand for a beach front property is downward sloping and the supply is perfectly inelastic. If a $1,000 tax per property is imposed on buyers, how will the tax burden be divided between the buyer and seller?

What portion of the uterus enlarges during the menstrual cycle and is sloughed off and discarded if an embryo fails to implant?

If a decrease in the price of football tickets increases the total revenue of the athletic department, this is evidence that demand is:

Suppose the quantity demanded is 1,000 bushels of peaches per year when the price is $3 per bushel and 1,500 bushels when the price is $1 per bushel. The price elasticity of demand in this range of the demand curve is:

The total cost of producing 4 units is $250. If the marginal cost of producing the fifth unit is $30 and the marginal cost of producing the sixth unit is $20, then the total cost of 6 units is

The figure shows the market for shirts in the United States, where D is the domestic demand curve and S is the domestic supply curve. The world price is $16 per shirt. The United States imposes a tariff on imported shirts, $4 per shirt. In the figure above, with the tariff Americans buy ________ million shirts per year.

Missouri can produce 15,000 tons of pecans per year or 40,000 tons of pears per year. Washington can produce 12,000 tons of pecans per year or 24,000 tons of pears per year. If these two states were to engage in trade, which of the following is true?

A streaming service that costs $5 per month increases their fee to $7 per month.  For most people, this isn’t a large percentage of their income.  We would expect the demand to be