A new amusement park presold discounted tickets for the opening day as well as upon arrival at the park. The opening day ticket sales for the park, including presales, is represented by this function, where T(A) is the number of tickets sold h hours after opening at 7:00 a. m. T(A)= 386?110h/h

What is the approximate rate of change in the number of tickets sold between 10:00 a. m. and 1:00 p. m.?