The city of san antonio is considering various options for providing water in its 50-year plan, including desalting. one brackish aquifer is expected to yield desalted water that will generate revenue of $4.1 million per year for the first 6 years, after which less production will decrease revenue by 10% per year each year. if the aquifer will be totally depleted in 22 years, what is the present worth of the desalting option revenue at an interest rate of 6% per year?

Tri fecta, a partnership, had revenues of $369,000 in its first year of operations. the partnership has not collected on $45,000 of its sales and still owes $39,500 on $155,000 of merchandise it purchased. there was no inventory on hand at the end of the year. the partnership paid $27,000 in salaries. the partners invested $48,000 in the business and $23,000 was borrowed on a five-year note. the partnership paid $2,070 in interest that was the amount owed for the year and paid $9,500 for a two-year insurance policy on the first day of business. compute net income for the first year for tri fecta.