A space shuttle is traveling from Earth to Mars that are 7.48x1010 m apart at that moment. The shuttle has a constant speed of 0.8c=2.4x108 m/s.  a. What is the distance travelled that is measured by a shuttle's engineer? _____________ b. What is the time of the trip measured by the shuttle's engineer? ________  c. What is the time of a trip measured by a space shuttle command in Houston?   ______________

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