6. For the cash flows below, determine the amount in year 1, if the annual worth in years 1 through 9 is $4000 and the interest rate is 12% per year.

Year	1	2	3	4	5	6	7	8	9
Cash	A	A+40	A+80	A+120	A+160	A+200	A+240	A+280	A+320

The amount in year 1, (in $)

Round to the nearest two (2) decimal places

7. The Department of Traffic Security of a city is considering the purchase of a new drone for aerial surveillance of traffic on its most congested streets. A similar purchase 4 years ago cost $900,000. At an interest rate of 7% per year, what is the equivalent value today of the previous $900,000 expenditure?

The equivalent value today, (in $)

Round to the nearest two (2) decimal places

8. Labco Scientific sells high-purity chemicals to universities, research laboratories, and pharmaceutical companies. The company wants to invest in new equipment that will reduce shipping costs by better matching the size of the completed products with the size of the shipping container. The new equipment is estimated to cost $560,000 to purchase and install. How much must Labco save each year for 3 years in order to justify the investment at an interest rate of 10% per year?

The amount Labco must save, (in $)

Round to nearest two (2) decimal places

9. A civil engineer planning for her retirement places 8% of her salary each year into a high-technology stock fund. If her salary this year (end of year 1) is $170,000 and she expects her salary to increase by 3% each year, what will be the future worth of her retirement fund after 17 years provided it earns 9% per year?

The future worth of her retirement fund, (in $)

Round to the nearest two (2) decimal places

10. Determine the size of your investment account 27 years from now (when you plan to retire) if you deposit $18,000 each year, beginning 1 year from now, and the account earns interest at a rate of 6% per year.

The size of the investment account, (in $)

Round to the nearest two (2) decimal places