According to the information given, using subtraction of time involving minutes, you should remind pj about her deliveries at 11:50 AM.
- She will begin her deliveries at 12:20 PM.
- You have to remind her 30 minutes before that.
- 20 minutes before is 12 PM.
- Before 12 PM, the times are AM.
- 10 minutes extra have to be subtracted(20 already have), 60 subtracted by 10 is 50, hence:
You should remind pj about her deliveries at 11:50 AM.
To learn more about operations involving hours and minutes, you can take a look at https://brainly.com/question/25169144
