Answer:
2 hours and 30 minutes.
Explanation:
We have been given that after finishing her shift, a waitress wrote 2.5 under "hours worked" on her time card. We are asked to find the time she worked.
We will convert our given time into hours and minutes as:


We know that 1 hour equals 60 minutes, so we will substitute 60 minutes our equation as:



Therefore, the waitress worked for 2 hours and 30 minutes.