Long Test #2 [15 pts] Find y if - 2 xy - 10xy + 3x+54+ 10 [5 pb] 2 Find y in @ if y = 1 The price-demand equation and the total cost for the production is P= 100-0.1x and ((x) = 45x+15000 [8 pts) (@) Find R(x) [7pls (b) What is the approx, revenue in selling the 301" item ( 5pis ] () Find the marginal profit function. ( 3 pts ] () Find P' (sac) and interpret the reald