SAT Math Practice Question
On Saturday afternoon, Armand sent $m$ text messages each hour for 5 hours, and Tyrone sent $p$ text messages each hour for 4 hours. Which of the following represents the total number of messages sent by Armand and Tyrone on Saturday afternoon?
- A.$9 m p$
- B.$20 m p$
- C.$5 m+4 p$
- D.$4 m+5 p$
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