Final answer:
Nolan has spent a total of 12 minutes brushing his teeth over the span of 6 days, brushing 2 minutes each night.
Step-by-step explanation:
To calculate the total time Nolan has spent brushing his teeth over the 6 days, you need to multiply the number of days by the number of minutes he brushes each night. Nolan brushes for 2 minutes each night for 6 days.
Therefore, the total time spent is:
2 minutes/night × 6 nights = 12 minutes.
So, the correct answer is: c) 12 minutes.