Differentiate. * 5 p y = In In(5x) t Add file Use the following to answer each question. The profit, in thousands of dollars, from the sale of a thousand ballpoint pens, can be estimated by: P(r) = 2.5x - 0.35x In(x) Find P'(x). * 5 pFind P'(250) and explain what this number represents. t Add file How many thousands of ballpoint pens should be sold to maximize profit? t Add file