1) An engineer invests $5000 at the end of every year for 40 years.If the engineer wants $1 million in savings at retirement, what interest must the investment earn?

2) Atlas Corp is considering an investment that is expected to produce a cash flow of $0 on the first year but will generate $2,600 for the next 4 years. This investment has an initial cost of $8,000. What is this investment's rate of return?

3) A firm invests $75,000 today and will save $9000/year in energy costs for 15 years. What is the project's rate of return? Should the firm pursue this investment if the minimum attractive rate of return (MARR) is 7.5%?

4) An equipment that costs $250,000 and would provide positive cash flows of $100,000, $90,000, $80,000, and $20,000 at the end of each year for the next four years. UNO's required rate of return is 10%, should UNO buy this machine? Will this change if we use the NPV approach?