Please explain step by step

9. Find the rate of change of totai revenue, cost. and prot with respect to time. Assume that Rtx) and 00:) are in dollars. dx R(x) = 4x. 00:) = 0.0112 + 0.3): + 5, when x = 25 and a = 7 units per day The rate of change of total revenue is $ per day. The rate of change of total cost is $ per day. The rate of change of total prot is $ per day