Can you answer this question. Please show work thanks.

17.) The order and transportation cost C of bottles of Pepsi is approximated by the function: C(x) =10,000 - x where x is the order size of bottles of Pepsi in hundreds. x x+3 According to Rolle's Theorem, the rate of change of cost must be zero for some order size in the interval [3, 6]. Find the order size. (You may use your TI-Nspire calculator)