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I NEED TO ANSWER THIS BY TODAY!! Will mark as brainliest

The Orion Space Capsule has started it's return to earth and is travelling at a speed of 24,600 mph.

a) Using the conversion factors that you have been taught, What is this speed in m/s?

b) If the spacecraft has to travel 270,000 miles to earth, how long should it take to reach low earth orbit 150 miles above earth?