Store Expects To Sell 640 Sofas

Sol: (1) Curve Differentiate this with respect to, ……………………. (1), Now to find the stationary point, When , Then When , Then (a) So the Coordinate of any stationary point is (b) Now differentiate the equation (1) with respect to, At We can see that so at the function is relative minima.At We can see that so at the function is also relative minima.(c) Sol: (2) Worker’s efficiency on the job is approximately is given by, (a) Efficiency after 3 hours. (b) Maximum efficiency occurs at, So maximum efficiency occurs after 2 hoursSol: (3) (a) Revenue function (b) If the total cost of producing units of this item is, then the profit function for the item is, (c) Marginal costderivative of cost function , Marginal cost , Marginal revenueDerivative of revenue function, Marginal revenue,(d) Determine the value of that will maximize profit,<span