Use the above table. What will the price be before external costs are internalized with a tax?

According to Keynes, once a system attains an economy-wide equilibrium

A) planned investment will be zero. B) there may or may not be excess productive capacity. C) the economy will be at full productive capacity. D) planned consumption will be zero.

An indifference curve is negatively-sloped because:

A) utility is a subjective concept. B) as the consumer obtains additional units of one good, the consumer is willing to sacrifice increasing amounts of the other good. C) in order to remain at the same level of utility, if an individual gets more of one good, he must sacrifice some of the other good. D) marginal utility is constant along an indifference curve, and increases in the consumption of one good cause the price of that good to fall.