Answer:
The monthly salary of Rosa after the raise is $2662.50.
Explanation:
Let the initial salary of Rosa be x.
Rosa received a monthly raise of $162.50 and this represented a 6.5% increase.

Multiply both sides by 100.


Divide both sides by 6.5.


The initial salary is 2500.
New salary = Initial salary + Increase


Therefore the monthly salary of Rosa after the raise is $2662.50.