You take out a 25-year $170,000 mortgage loan with an apr of 9% and monthly payments. in 12 years you decide to sell your house and pay off the mortgage. what is the principal balance on the loan? (round the monthly loan payment to 2 decimal places when computing the answer. round your answer to 2 decimal places.)

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?