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- Temperature between fluids in a heat exchanger used to heat a medium Based on the difference (X) (X> 2) the annual fuel cost (Y1) and the annual investment cost (Y2) are given as. Determine the temperature difference that will minimize the annual total cost (Y) Y1 = 6X2 - 10X + 5000 Y2 = 25000 - X2 - 140Xthe fuel efficiency for a certain mid size car is given by E(v)=-0.018v^2 + 1.476v+ 3.4 where E(v) is the fuel efficiency in miles per gallon for a car travelling v miles per hour. what speed will yield the maximun fuel efficiency? What is the maximunfuel efficiency for this car?Test graphically if the data suppport the proportionality: y proportional to x3
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- The estimated Philippine population is 90 million in 2010 and the estimated growth rate was 2.4 % per year. That is n(2010) = 9 x107 and k= 0.024. So an equation for predicting the population with the stated initial condition and growth rate of 2010 isAnalysis of daily output of a factory shows that, on average, the number of units per hour y produced after t hours of production is y = 24t + 0.5t2 − t3, 0 ≤ t ≤ 5I am confused about the method to use. Is it variation of parameters or reduction of power?