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) 9mp
B) 20mp
C) 5m + 4p
D) 4m +5p

9mp

Step-by-step explanation:

Add the amount of hours they texted.

C

Step-by-step explanation:

Armand's message (m) x 5 hours = 5m

Tyrome's message (p) x 4 hours = 4p

Sum means to add both of them together.

5m + 4p

step-by-step explanation: a reaction is first order. if the initial reactant concentration is 0.0200 m, and 25.0 days later the concentration is 6.25 x 10-4 m, then its half-life is:

2.83941151 would be the answer you're looking for! : )