Question

5. The black bars of a barcode printed on a book represent
a. the writer's name b. the book's name
c. a number
6. A plotter is most likely to be used by
a. engineers
b. school teachers
c. bankers
7. Which of these can be used during a video chat?
a. headphones
b. webcam
c. both a and b​

Answer 1

Answer:

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