The price p (in dollars) and the demand X for an item is given by the price-demand function p(x) = 15 - 0-0015X. Find the marginal revenue at X: 1:000. Question 20 10 Points Find the equation of the tangent line to f(X) = 3cscx + xsinx at X= 2 A y=x-3 B y=x+3+ 2 c y=x+3 D) y=x+3 -. 2A bag of sand hanging from a vertical spring is in simple harmonic motion as given by the position . TI TI function 5(t) = - $|n(7t+ E) where t is measured in seconds and 5 is in inches. Find the velocity of the spring at t: 2 s. - J3" inch/s %inch/S J?" inch! 5 @ %inch/S