In 2017, there were about 21 million teenagers (aged 13-17) in the United States. They each
se...
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Mathematics, 10.03.2020 20:01 sasalove
In 2017, there were about 21 million teenagers (aged 13-17) in the United States. They each
sent an average of 800 text messages per month. About how many text messages did all of the
teenagers in the United States send each month? Express your answer using scientific
notation. Show work for full credit.
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