Assuming a market rate of interest equal to 7 percent, what is the present value of $200 to be received one year from today?

When there is a change in the quantity demanded it means that

A) the selling price of the products has not changed. B) the number of products in inventory have increased. C) the hours the customer can buy products each day have increased. D) the quantity a consumer is willing to buy changes when the price changes.

The figure above shows a nation's production possibilities frontier. If the marginal cost equals the marginal benefit at point A when 4 million pizzas are produced,

A) allocative efficiency is achieved but production efficiency is not achieved because there are no tacos being produced. B) both allocative and production efficiency are achieved. C) production efficiency is achieved but allocative efficiency is not achieved because there are no tacos being produced. D) production efficiency is achieved but allocative efficiency is not achieved because the number of tacos produced is at its absolute maximum. E) neither allocative nor production efficiency has been achieved.