A chemical reactor, which will contain corrosive liquids, has been designed.The reactor may be made of mild steel or stainless steel. The initial cost, including installation, of a mild steel reactor is expected to be P 72,000 and would last 5 years. Stainless steel is more resistant to the corrosive action of the liquids, but is more expensive and will cost P 120,000. Assuming that both types of reactors will have no salvage or scrap value at the end of their useful lives and could be replaced at the same costs as before, and if money is worth 12% compounded annually, what should the useful life of the stainless reactor be so that the capitalized costs are equal?

Has the natural gas revolution in the United States made coal-fired power plants more or less profitable? Why or why not?

Plot the logarithm of arrivals for each transportation mode against time, all on the same graph. Which now appears to be growing the fastest?

The economic analysis division of Mapco Enterprises has estimated the demand function for its line of weed trimmers as QD=18,000+0.4N350PM+90Ps where N=numberofnewhomescompletedintheprimarymarketarea PM=priceoftheMapcotrimmerPS=priceofitscompetitorsSurefiretrimmer In 2010, 15,000 new homes are expected to be completed in the primary market area. Mapco plans to charge $50 for its trimmer. The Surefire trimmer is expected to sell for $55. What sales are forecasted for 2010 under these conditions? If its competitor cuts the price of the Surefire trimmer to $50, what effect will this have on Mapcos sales? What effect would a 30 percent reduction in the number of new homes completed have on Mapcos sales (ignore the impact of the price cut of the Surefire trimmer)?