Assume the marginal propensity to consume (MPC) is 0.67, the tax rate ( t ) (t) is 10 %, 10%, autonomous expenditure $ 300 billion, $300 billion, and the marginal propensity to import (MPM) is 0.1 . 0.1. Choose the equation that best describes the aggregate planned expenditure line (AE).

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?