Maintenance costs for a regenerative thermal oxidizer increased according to an arithmetic gradient for 5 years. The cost in year 1 was $7000. If the interest rate is 10% per year and the present worth of the costs for a 5-year period was $28,800, the amount of the yearly increase, G, was closest to: (a) $1670 (b) $945 (c) $620 (d) $330

A company purchase a piece of manufacturing equipment for an additional income. The expected income is $4,500 per semester. Its useful ife is 9 years. Expenses are estimated to be $500 semiannually if the purchase price is $44,000 and there is a salvage value of $4,500, what is the prospective rate of return (RR) of this investment? The MARR is 10% compounded semiannually Oa IRR-602% semiannual Oh IRR-3% semiannual ORR-12% semiannual Od IRR-6.23% semiannual

Equipment maintenance costs for manufacturing explosion-proof pressure switches are projected to be $125,000 in year one and increase by 3% each year through year five. What is the equivalent annual worth of the maintenance costs at an interest rate of 10% per year, compounded bi-monthly (compounded once in two months)? The equivalent annual worth is $

The operating and maintenance expenses for a mining machine are expected to be $11000 in the first year and increase by $700 per year during the 25-year life of the machine. What uniform series of payments would cover these expenses over the life of the machine? Interest is 10%/year compounded annually. $4