QUESTION 4 Question / 1. Assume that the sales of a computer retail store are approximated by a linear function Sales were $810,000 in 1983 and $2,310,000 in 1988. Let x=0 represent 1983. Find the equation giving yearly sales. Estimate sales in 1991. (4 points) 2. A manufacturer bought a milling machine for $237,000. It has a scrap value of $85,000. The useful life can range from 5 to 10 years. The manufacturer wants to show no more than $17,390 per year in depreciation. How many years (integer) should be used for its life? Round your answer (4 points) 3. Bob owns a watch repair shop. He has found that the cost of operating his shop is given by C(x)=x_-368x+60 , where c is cost and x is the number of watches repaired. How many watches must he repair to have the lowest cost? (4 points) 4. Suppose the supply and demand for a certain DVD are given by p=15q- and p-15q2+30 , respectively, where p is price and q is quantity. Find the equilibrium demand and equilibrium price. Round answer to three decimal places. (4 points) ess ALT+F10 (PC) or ALT+FN+F10 (Mac). S Paragraph v Arial V 14px