Can someone please explain it to me ASAP?!!! The first one is correct but the second one is wrong. What is correct answer for this question? This is velocity and net changes.

a train approaching a station begins decelerating from a speed of 104 mi/hr according to the acceleration function a(t) = - 1664(1 + 8t) -mi/hr2, where t 2 0. How far does the train travel between ( = 0 and Between t = 0.2 and t = 0.5? . . . . . een t = 0 and t= 0.2 the train travels 8.000 mi. nd to three decimal places as needed.) ween t = 0.2 and t= 0.5 the train travels 0.200 mi. und to three decimal places as needed.)