You drive on Interstate 10 from San Antonio to Houston, onehalf the time at 35.0 mi/h km/h) and the other half at 55.0 mi/h km/h). On the way back you travel one- half the distance at 35.0 mi/h and the other half at 55.0 mi/h. What is your average speed (a) from San Antonio to Houston, (b) from Houston back to San Antonio, and (c) for the entire trip?

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