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11-85.

The table below shows the rate of books being checked out (in books per hour) from the local library at various times (in hours) during the day.

time

rate

47

7

  1. About how many books were checked out during the day?

    This is the area under .

  2. What was the average rate of books being checked out?

    You computed the total books check out in part (a).
    What is the total number of hours?