Final answer:
There are 720 minutes from midday to midnight.
Step-by-step explanation:
The time from midday to midnight is 12 hours, which is equivalent to 720 minutes.
To calculate the number of minutes, you subtract the number of minutes from midday to 6 p.m. (3 hours x 60 minutes = 180 minutes) from the total number of minutes from midday to midnight (12 hours x 60 minutes = 720 minutes). This leaves us with 720 - 180 = 540 minutes from 6 p.m. to midnight.
Therefore, there are 720 minutes from midday to midnight.