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Julie drives 110 to Grandmother's house. On the way to Grandmother's, Julie drives half the distance at 40 and half the distance at 70 .

Julie drives 110 to Grandmother's house. On the way to Grandmother's, Julie drives half the distance at 40 and half the distance at 70 . On her return trip, she drives half the time at 40 and half the time at 70 .

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