Zhen is an audiobook narrator. The table gives some completed audio lengths and the amount of time Zhen spends researching, recording, and editing the audiobook.

Completed (hours) _ Working time (hours)
1 _ 6 1/2

3 1/2 _ 22 3/4

7 _ 45 1/2

10 _ 65

a.

Step-by-step explanation:

The following information is missing in the question:

What does 6 1/2 mean in this situation

a. Zhen spends 6 1/2 hours working for every hour of the completed audiobook.

b. Zhen completes 6 1/2 audiobooks in an hour.

c. Zhen spends 6 1/2 hours working per audiobook.

It means that Zhen needs 6 1/2 working hours to record 1 hour of the audiobook. Zhen needs to work more than one hour to record one hour of the audiobook, because besides recording, he also needs to research and edit.

to determine the unit cost your would divide the total cost by the number sold.

7 bagels for $4.41       $4.41/7 = $.63 each at fresh side

5 bagels for $3.60         $3.60/5 = $.72 each at value mart