If people are acting to improve or sustain their own self-interest when it comes to resources derived from publicly available goods and are depleting those same resources, this is known as a good becoming no longer rivalrous. a good becoming no longer rivalrous. a good becoming excludable. a good becoming excludable. the tragedy of the commons.

Six years ago, an 80-kw diesel electric set cost $160,000. the cost index for this class of equipment six years ago was 187 and is now 194. the cost-capacity factor is 0.6. the plant engineering staff is considering a 120-kw unit of the same general design to power a small isolated plant. assume we want to add a precompressor, which (when isolated and estimated separately) currently costs $13291. determine the total cost of the 120-kw unit. (hint: skip $ and comma symbols)

How do you know if two line segments are perpendicular?

Suppose that two countries, britain and the u.s. produce just one good - beef. suppose that the price of beef in the u.s. is $2.80 per pound, and in britain it is £3.70 per pound. according to ppp theory, what should the $/£ spot exchange rate be? suppose the price of beef is expected to rise to $3.10 in the u.s. and to £4.65 in britain. what should be the one year forward $/£ exchange rate?