A town want to replace an existing bridge that cost $5000 annually in an operation and maintenance has a remaining useful life of 20yrs. The new bridge will cost $500000 for construction and an additional $2000 for manual operation. The new bridge is expected to have a useful life of 50yrs. Thus, extending the life by 30yrs if interest rate is 8% single payment present worth of 20yrs is what?

A bank account pays 3% interest with monthly compounding. A series of deposits started with a deposit of $5000 on January 1, 2007. Deposits in the series were to occur each 6 months. Each deposit in the series is for $150 less than the one before it. The last deposit in the series will be due on July 1, 2021. What is the future worth of the account on July 1, 2024, if the balance was zero before the first deposit and no withdrawals are made?

3 A sum of $6000 is invested at an interest rate of 7% per year. Find the time required fokthe Money to double if the interest is compounded according to the following method.

If the interest rate is 10% and cash flows are $1000 at the end of year one and $2000 at the end of year two, then the present value of these cash flows is??