Final answer:
Maria will spend 15 minutes at the post office, 1 hour and 25 minutes at the mall, and 20 minutes driving to her friend's. Starting at 1:00 pm, she will arrive around 3:00 pm after accounting for all her errands.
Step-by-step explanation:
If Maria is planning to run some errands before reaching her friend's house, we need to calculate the total time she will spend on these activities to determine when she will arrive. Maria plans to spend 15 minutes at the post office, 1 hour and 25 minutes at the mall, and then an additional 20 minutes driving to her friend's house. Starting from her house at 1:00 pm, we add up the times:
- Post office: 15 minutes
- Mall: 85 minutes (1 hour and 25 minutes)
- Drive to friend's house: 20 minutes
Adding these together gives a total of 120 minutes, or 2 hours. Therefore, if Maria leaves at 1:00 pm, she should arrive at her friend's house at around 3:00 pm.
This type of question involves basic time addition and is a practical application of mathematics, which can be very useful in everyday situations, such as managing a boutique or planning a daily schedule.