7 The bookstore sells 9 keychains in a day if the unit price is $2. If the bookstore increases the price by a dollar, it sells one fewer keychain daily. Suppose the demand function is linear. The supply function for keychains is q(p) 2vp+4 where p is the unit price. Find the price at which there is no shortage nor surplus 8) The bookstore decideds to sell bobbleheads, and each bobblehead costs the bookstore $2 and there is no fixed cost. Suppose the cost function is linear. Suppose the demand function for bobbleheads is qp) p+14p + 24 where p is the unit price. Find the price at which the bookstore breaks even.

If the demand function is  p=480-3q and the supply function is  p=17q+80  Find the equilibrium point.  Write as an ordered pair.

Suppose demand is given by p = 1600 − x. Find the maximum revenue.

When Green Eggs and Ham are sold for $4.00 per apple at Whoville, approximately 2500 servings are sold. When the price is raised to $4.50 per Green Eggs and Ham, the number of servings sold drops to 2250. The cost of producing and shipping the Green Eggs and Ham can be modeled by, C = 3000 + .6x Assuming that the demand function is linear, what price will yield a maximum profit