The modern Keynesian Model assumes that A. that prices fully respond to changes in aggregate demand so the economy is always at full employment. B. that prices are sticky upward. C. that prices respond to changes in aggregate demand but not fully. D. that the economy only responds via outpu

Anew 2-lane road is needed in a part of town that is growing. at some point the road will need 4 lanes to handle the anticipated traffic. if the city's optimistic estimate of growth is used, the expansion will be needed in 4 years and has a probability of happening of 40%. for the most likely and pessimistic estimates, the expansion will be needed in 8 and 15 years respectively. the probability of the pessimistic estimate happening is 20%. the expansion will cost $ 4.2 million and the interest rate is 8%. what is the expected pw the expansion will cost?