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The General Hospital is evaluating new office equipment offered by three companies. The interest rate is 8%. Company A Company B Company C Cost $500 $600 $700 Annual benefit 130 115 100 End of useful life salvage value 0 250 180 Useful life (yrs) 5 5 10 6-2: Use an annual cash flow analysis to determine the company from which you should purchase the equipment. ? Company A ? Company B ? Company C ? do nothing 6-3: Determine the incremental rate of return between Company B and Company C. ? 7.5% ? 8.5% ? 9.5% ? 10.5%
What is the contact time (min) required to achieve a log-3 deactivation of Giardia in water of 10 °C temperature, at pH 7, if the chlorine concentration is 2.2 mg/L
A plate storage system for a self-serve salad bar in a restaurant. As plates are added to or withdrawn from the stack, the spring force and stiffness are such that the plates always protrude above the tabletop by about 60 mm.
Assume the ledge has the dimensions shown and is attached to the building with a series of equally spaved pins around the circumference of the building.
Design a cord (design the constants k and ) so the cord stretches 2.5 times the unstretched length, and the acceleration of the jumper doesn't exceed 3g, and the cord has zero stiffness at the bottom of a 400ft drop.
A company has been discharging its waste into a holding pit for a long time. For the last several years, the pit has been full and overflowing into a local river. The waste concentration has been nearly constant at 10 mg/L of the pollutant of inte..
Where should a single 500-lb live load be places on the beam so it causes the largest live moment at D? What is this moment? Assume the support at A is fixed, B is pinned, and C is a Roller
A car has the following characteristics: weight = 18000 N; cross-sectional area = 2.5 m^2, drag coefficient = 0.5; rolling friction coefficient = 0.02. The energy content of gasoline is 3.5E10^7 Joules/Liter.
A rectangular open channel with a width of 10 ft and n = 0.013 conveys a discharge of 300 cfs. The upstream portion of the channel has a slope of 10%, which then abruptly changes to a slope of zero downstream.
A rectangular gate is inclined at an angle of 30 degrees from the horizontal. It is 4 ft wide by 6 feet long. If it is hung from its upper end which is 8 feet below the waters top edge, what minimum applied force (bottom) is needed to open the gat..
Need to design a cantilever retaining wall 8m high, saturated unit weight is 16kn/m 3 , surcharge is 7kn/m 2 , load above wall supported on wall stem
Calculate the additional stress as a function of depth that a temporary construction wall , like that shown in Figure As 1, must take as the result of a crane sustained in the zone above it.
John had a little business on the side and did not have a girlfriend when he was at school and ehnce he was able to save the $10,000 for his dream car. The dealer agrees to take the car back for $8000
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