(1 point) Find the equation of the tangent line to the graph of y(x) = 8(x - _) at x = 2. Equation of the tangent line is y = Round your constants to 3 decimal places if needed.(1 point) A totalrevenue function is given by R(x) = BOON/x2 0.2x where R(x) is the total revenue, in thousands of dollars, from the sale of x airplanes. Find the rate at which the total revenue is changing when 21 airplanes have been sold. ::: dollars per airplane. Round to two decimal places. (1 point) A total-cost function is given by C(x) = 1200(x2 + 5)\"3 + 700 where C(x) is the total cost, in thousands of dollars, for the production of x airplanes. Find the rate at which the total cost is changing when 21 airplanes have been sold. ::: dollars per airplane. Bound to two decimal places. (1 point) Suppose the demand function for a product is given by 70000 DOD) = T where D(p) is the quantity in demand at price p. Also suppose that price is a function of time: p = 4.5t + 10 where t is in days. Find the rate of change of the quantity in demand after 81 days. ::: units per day. Round to three decimal places