(really need fast) the speed of sound is approximately 1.2x10^3 km/h. how long does it take for sound to travel 7.2 x 10^2 km? write the answer in minutes.

In order to determine the number of hours it will take for the sound to travel a certain distance, we divide the given distance by the speed. Mathematically,
                                    time = distance / speed
Substituting the known values,
                                    time = (7.2 x 10^2 km) / (1.2 x 10^3 km/h)
                                     time = 0.6 h
The answer given above is already in the correct number of significant figures. Therefore, the answer is 0.6 hours. 

X> -2 is the simplified version.