ook This question: 1 point(s) possible Find the rate of change of total revenue, cost, and profit with respect to time. Assume that R(x) and C(x) are in dollars. dx R(x) = 4x, C(x) =0.01x2+ 0.3x + 20, when x = 30 and dt = 9 units per day The rate of change of total revenue is $ per day. Irc The rate of change of total cost is $ per day. The rate of change of total profit is $ per day. 15 To