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algebra

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Parking in a student cost $3 for the first half hour and $1.50 for each hour thereafter. A partial hour is charged the same as a full hour. What is the longest time that a student can park in this lot for $9?

  • algebra -

    9 - 3 = 6

    6/1.5 = 4

    4 + 1/2 = 4 1/2 hours

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