The distance from Neptune to Mars is 4, point, 2, 7, 2, times, 10, to the power 9 4.272×10
9
kilometers. How long would it take a rocket, traveling at 3, point, 8, 8, times, 10, to the power 4 3.88×10
4
kilometers per hour to travel from Neptune to Mars? Round your answer to the nearest whole number of hours.