Given s(t) = 2t+4, where s(t) is in miles and t is in hours, find each of the following. a) v(t) b) a(t) c) The velocity and acceleration when t=2 hr d) When the distance function is given by a linear function, there is uniform motion. What does uniform motion mean in terms of velocity and acceleration? Given a total-revenue function R(x)=600x -0.3x and a total-cost function C(x) = 1600 (x+2) +500, both in thousands of dollars, find the rate at which total profit is changing when x items have been produced and sold. Find an equation for the tangent line to the graph of y = (x - 16x) 12 at the point (4,0).